Did Prophet Muhammad (ﷺ) Say Child Resemblance Isn't Based on DNA?

In this article, we'll uncover what Prophet Muhammad (ﷺ) really said about child resemblance, clear up common misconceptions about his words, and demonstrate how both classical and contemporary scholars have explained these prophetic teachings. We will also be careful to state precisely where the prophetic wording does and does not map onto modern biology, so that the defense is honest as well as confident.

The Hadith About Child Resemblance

One well-known hadith, narrated by the Companion Anas ibn Malik, describes a conversation where the Prophet Muhammad (ﷺ) explains why a child sometimes resembles the father and other times the mother. In Sahih al-Bukhari, it's recorded that a Jewish man (identified as Abdullah bin Salam) asked the Prophet a series of questions to test his prophethood. One question was: "Why does a child resemble its father, or why does it resemble its maternal uncle (the mother's side)?" The Prophet replied:

"As for the resemblance of the child to its parents: If a man has sexual intercourse with his wife and gets discharge first, the child will resemble the father. If the woman discharges first, the child will resemble her."

Upon hearing this answer, Abdullah bin Salam immediately recognized it as truth and declared his belief in the Prophet. In another version of the hadith, the Prophet phrased it slightly differently: he mentioned that the man's "water" (fluid) is thick and white and the woman's "water" is thin and yellow, and that the resemblance comes from "whichever of the two waters dominates, rises above, or precedes" (Sahih Muslim 311). This version highlights the idea of one parent's contribution "dominating" the traits of the child.

These narrations might sound a bit strange at first (talking about who "discharges" first) but they carry an important meaning. The Prophet was describing the conception process in terms people of the 7th century could observe (the release of fluids from the parents). His answer essentially said: whichever parent's contribution prevails, the child will resemble that parent. To understand this properly, we need to clarify what "discharges first" really means in the original Arabic context, and to be precise about which narrations are involved.

The Wet-Dream Narrations and the Woman's Water

Critics often point to a cluster of narrations dealing with a woman's experience of a wet dream, and it is important to address them directly rather than to focus only on the Abdullah ibn Salam report. The relevant narrations are:

These reports do two things. First, they establish a ruling: a woman who sees discharge after a wet dream must perform ghusl, just as a man does. Second, they connect that female "water" to the fact that a child can resemble its mother. We should engage what they actually say, including the detail that the woman's water is "thin and yellow," rather than pretending the texts speak only of the egg cell.

A necessary clarification about the woman's "water"

It is tempting to read these narrations as if the visible discharge mentioned in the wet-dream context is the ovum, or as if that fluid itself carries the mother's hereditary code. That reading is not accurate, and the article should not rest on it.

The visible discharge mentioned in the wet-dream narrations should not be identified simplistically with the ovum itself. In modern biology, the mother's hereditary contribution is carried by the egg cell, which is released internally at ovulation. The hadith's term "water" is best understood more broadly as the woman's reproductive contribution, described in the observable language available to the first audience.

Modern biology is clear on the mechanism: the zygote's DNA is half from the mother's egg and half from the father's sperm (MedlinePlus, Fetal development). The Cleveland Clinic likewise defines the ovum as the female reproductive cell released at ovulation, which contains half of the genetic information needed to create a fetus. None of that hereditary material is the yellow fluid observed after a wet dream.

Objection: The hadith mentions the woman's yellow fluid seen after a wet dream, but that fluid is not the egg and does not itself form the child's genome.

Answer: Correct. The article should not claim that the visible discharge itself is the DNA-bearing gamete. The stronger reading is that the Prophet ﷺ affirmed a real female reproductive contribution to resemblance using the language of "water," while modern biology identifies the exact hereditary carrier as the ovum. The visible discharge is connected to female sexual and reproductive function, but it should not be called the genetic material itself.

This is the core of an honest defense: the hadith affirms that the woman truly contributes to the child's resemblance. That affirmation was significant in a world of competing and often inaccurate theories of reproduction, even though some pre-Islamic physicians also speculated about female contribution. It does not need to be read as a statement that the observed fluid is the gamete.

Understanding "Whichever Parent's Discharge Comes First"

At first glance, one might think the hadith is saying "whoever orgasms first, the baby looks like that parent." This has led to confusion and the misconception that Islam teaches a purely timing-based mechanism for resemblance. The Arabic reports should be handled with more precision. Some narrations use sabaqa (سَبَقَ), which can mean to precede, outstrip, or get ahead; other narrations add ala (عَلا), meaning to rise above, be uppermost, or prevail. In one narration, the phrase is "فَأَيُّهُمَا عَلا أَو سَبَقَ يَكُونُ مِنْهُ الشَّبَهُ", meaning: "whichever of the two rises above/prevails or precedes, the resemblance will be from that one." So the wording includes precedence, but it is not safe to reduce the whole set of narrations to a crude stopwatch-mechanism of orgasm timing.

So the resemblance comes from whichever of the two waters dominates, rises above, or precedes. It is worth noting that some modern translations (such as the Darussalam edition on Sunnah.com) render this interpretively as "genes prevail" or "genes dominate," but that is a biological gloss, not the literal wording. The Arabic word is ماء (ma) "water" or "fluid" and the verb is ala aw sabaqa "rose above/dominated or preceded." Keeping the literal sense in view makes the argument harder to attack, because we are not smuggling the modern word "gene" into a 7th-century text.

Classical scholars explained that "the one whose fluid is uppermost or dominant" is the one the child will resemble. Imam Al-Nawawi, in his commentary on Sahih Muslim, notes that "dominance" (uluw) here can mean precedence, abundance, or strength and he also explains "resemblance" as the child sharing in some of a parent's qualities, not necessarily being identical. In other words, the classical tradition already understood the wording as broader than a mere race to climax: it could mean which contribution is stronger, greater in quantity, or prevailing in characteristics.

For that reason, the phrase "discharges first" should not be treated as a complete biological mechanism by itself. It is a translation of one strand of wording, while the wider hadith corpus also speaks of one "water" being uppermost or prevailing. The safest explanation is that the Prophet Muhammad (PBUH) described resemblance through the observable language of parental reproductive contribution, precedence, and predominance, without spelling out chromosomes or genes. Modern genetics gives us a way to understand how traits from one side may become more visible than traits from the other, but it does not prove that the visible discharge itself carries the hereditary code. With that caution in place, let's look at what modern genetics actually says.

Resemblance and Modern Genetics

Modern genetics confirms that resemblance is inherited through DNA from both parents: the sperm contributes paternal DNA and the ovum contributes maternal DNA. When conception occurs, a zygote is formed by the union of the father's sperm and the mother's egg, each carrying 23 chromosomes that contain thousands of genes.

Some traits do follow a simple dominant/recessive pattern. For example, if the father contributes a dominant gene for brown eyes and the mother a recessive gene for blue eyes, the child will have brown eyes, resembling the father in that trait. But many human traits are not simple Mendelian dominant/recessive traits at all they are polygenic, influenced by the interaction of many genes, or shaped by complex patterns of gene expression. Height, skin tone, and face shape are good examples of traits that arise from many genes acting together.

For this reason, we should be careful not to reduce all resemblance to a single "dominant gene versus recessive gene" picture. The most accurate statement is this:

The hadith's claim that a child's resemblance may incline toward one parental side is compatible with heredity, in which both parents contribute and certain traits can prevail. But it should not be presented as a detailed modern genetics textbook, and "dominance" in the hadith should not be flattened into the technical term "dominant allele."

There is also a genuine point of beauty here: the Prophet (ﷺ) affirmed that both the man and the woman have a "water" that contributes to the child. At a time when many people thought only the man's seed mattered and the woman was merely a vessel, this was a striking affirmation of the mother's real reproductive role. Modern biology identifies that maternal contribution precisely as the ovum and its DNA. The hadith speaks of it in the observable language of "water"; it should not be read as claiming that the visible wet-dream discharge is itself that egg cell.

A Note on Female Fluids and the Egg

To keep the biology clear, it helps to distinguish several different things that are sometimes lumped together as a woman's "fluid":

Female sexual fluids can include vaginal lubrication, cervical secretions, Bartholin gland secretions, and Skene's gland fluid, among other secretions. These may accompany arousal or orgasm, but they are not the ovum. The ovum is released internally during ovulation and is drawn toward the fallopian tube.

The Cleveland Clinic notes that the Skene's glands secrete fluid during sexual arousal and may release fluid during orgasm, while the Bartholin glands and vaginal wall secretions contribute to lubrication. MedlinePlus, in turn, describes ovulation as the internal release of the egg. In other words, the fluids a person can observe are not the same thing as the reproductive egg cell.

A careful word is needed here, because it would be too strong to say female discharge contains "no genetic material" at all. Vaginal secretions are a complex mixture that can include shed cells, and cells contain DNA the National Institute of Justice describes vaginal secretions as exactly such a mixture of cells and fluids. The precise and defensible point is therefore:

The visible discharge is not the gametic genetic contribution that combines with the sperm to form the child. That contribution is the ovum.

This distinction matters: it lets us defend the hadith's affirmation of a female reproductive contribution without making the technically vulnerable claim that female fluids carry "no DNA."

Quranic Verses Hinting at Mixed Parental Contributions

The Quran, revealed in the same era, doesn't use modern scientific terms but contains verses that align with the idea of both male and female contributions in creation. For example, the Quran states: "Verily We created man from a drop of mixed fluid in order to test him" (Surah Al-Insan 76:2). The Arabic term used is "nutfah amshaj," meaning a mixed drop. Many early Muslim commentators explained this as the mingling of the man's and woman's fluids, while others discussed mixture in terms of stages, elements, or qualities of the created human. It is fair to say that the verse can be read consistently with a dual parental contribution; it is not precise to say that the verse itself is a technical statement about DNA or genetic material.

Other verses emphasize that male and female are created by Allah's will from the emitted nutfah. Surah An-Najm says that Allah "creates the two mates, the male and the female, from a sperm-drop when it is emitted" (53:45-46), and Surah Al-Qiyamah (75:37-39) mentions the emitted nutfah, the alaqah, then Allah's shaping and making the two genders. These verses should not be overstated as if they teach chromosomes explicitly. They are, however, consistent with the established fact that chromosomal sex is ordinarily determined by whether an X-bearing or Y-bearing sperm fertilizes the ovum, while the whole outcome remains by Allah's decree.

These verses do not explicitly discuss resemblance to one parent or the other. Together with verses such as "O mankind, We created you from a male and a female" (49:13), they affirm that human beings come through both paternal and maternal involvement, and that sex, form, and features are ultimately created by Allah. This supports the broader scriptural picture without forcing every verse into a modern genetics lesson.

In summary, the Prophet's hadith and the Quranic hints both reflect that a child is the result of mixed input from father and mother, and that one parent's characteristics can prevail. Now let's look at how scholars through history have understood these statements, and how modern scholars reconcile them with today's science.

The Black Baby and the Camel: A Lesson in Hereditary Traits

There is an authentic hadith that powerfully illustrates the Prophet's teaching about inherited traits. It's narrated by Abu Hurayrah that a Bedouin man came to the Prophet, upset and suspicious because his wife had given birth to a dark-skinned (black) baby. The hadith does not state the complexions of the man and his wife; it simply reports that he was troubled by the birth of a black child and was implicitly raising a question about paternity. Sensing his anguish, the Prophet Muhammad (ﷺ) responded with a series of questions:

Prophet: "Do you have camels?" Man: "Yes." Prophet: "What color are they?" Man: "Red." (a common camel color) Prophet: "Are any of them gray?" Man: "Yes, one of them is gray." Prophet: "How did that happen (how did it get that color)?" Man: "Maybe it inherited it from an ancestor (some distant breed)." Prophet: "Likewise, perhaps your son has inherited this (color) from his ancestors."

The Prophet Muhammad (PBUH) did not let the man turn an unusual appearance into an accusation. He reminded him of an ordinary fact he already accepted in his own camels: a visible trait may appear because of an inherited strain (irq) even when it is not obvious in the immediate parent. In modern terms, some traits can be hidden, recessive, polygenic, or reappear through complex inheritance, but the hadith itself does not specify the exact genetic mechanism. Nor does it restrict the possible ancestry to the father's side only; the point is that family lineage can contain traits that are not immediately visible in both parents.

This hadith is recorded in both Bukhari and Muslim, underlining its authenticity. It demonstrates the Prophet's wisdom in solving a real-world family crisis through a sound analogy from heredity. People in many cultures, especially herders and breeders, had observed that traits can run through lineages; the prophetic wisdom here was to apply that principle justly and prevent suspicion without evidence. The hadith teaches that a child can show a trait not obvious in the immediate parents, which fits the general reality of inherited traits that can remain hidden and later appear.

For Muslims, the report is also a beautiful example of prophetic guidance: he explained inherited resemblance in a way that was easily understood, using camels as an example for people familiar with them. It accords with the general principle that traits can be passed down and reappear across generations, and it prevented an unjust accusation from being built on mere surprise.

This story, together with the earlier hadith on resemblance, shows that Prophet Muhammad (ﷺ) addressed principles of heredity in various contexts in ways that are consistent with knowledge that would only be developed in detail many centuries later. Now, knowing all this, let's address some common misconceptions that people have about these hadiths, and clarify them with both linguistic understanding and scientific evidence.

Addressing Common Misconceptions and Misinterpretations

Misconception 1: "The hadith says whichever parent climaxes first 100% determines the child's looks (or gender)." This is a misunderstanding of wording. As explained, "comes first" in the hadith is a translation of "sabaqa," which sits alongside "ala" to rise above, prevail. It's not a simplistic race between orgasms. The correct understanding is about prevailing contribution, not mere timing. If one took it as just timing, it would not always hold true biologically. The hadith isn't providing a mechanical formula for parents to control who the baby looks like; it's describing the general principle of one parental contribution prevailing, in terms familiar to the questioners. Indeed, classical scholars such as al-Nawawi already read "dominance" as precedence, strength, or abundance, not merely chronological order.

Misconception 2: "Prophet Muhammad (ﷺ) denied DNA or genes by attributing resemblance to fluids." The Prophet did not deny that something in the parents' contributions causes resemblance on the contrary, he affirmed it. He spoke of "water" from each parent because that is what people could observe. We should be careful, though, not to overclaim: the visible fluids are not themselves the hereditary carriers, and the article should not say that the observed discharge "is" the DNA. The accurate statement is that the hadith affirms a real contribution from each parent to the child's resemblance, and modern biology identifies the carriers of that contribution as the DNA in the sperm and the ovum. The hadith does not contradict DNA-based inheritance; it simply speaks in 7th-century observational language rather than the language of genetics.

Misconception 3: "The hadith claims the mother's fluid determines if the baby is female, which is scientifically wrong." A report narrated by Thawban in Sahih Muslim does connect the "prevailing" of the man's or woman's water with the child being male or female by Allah's permission. Because it is in Sahih Muslim, it should not be dismissed as a weak report or casually described as an insertion. At the same time, it must not be turned into the claim that visible female discharge contains a Y chromosome, or that parents can control a baby's sex by timing orgasm.

The established biological mechanism is that the ovum normally carries an X chromosome, while the fertilizing sperm carries either X or Y; in that immediate chromosomal sense, the sperm determines whether the embryo is XX or XY. The mother's reproductive tract, ovum, and biological environment are still part of the process of fertilization, but they do not supply the Y chromosome. Therefore, any explanation of the Thawban wording has to respect both the authentic wording and established biology.

Classical commentators generally understood these reports in the pre-modern language of the two "waters" meeting, preceding, or prevailing, and they did not intend a chromosome-level explanation. Some scholars discussed the variation among narrations and gave special attention to the more frequent resemblance wording; others reconciled the sex wording by saying that "prevailing" refers to a real factor in conception whose exact mechanism is not detailed in the hadith. The honest position is: the main cluster of narrations is clearly about resemblance, the Thawban narration about sex is authentic but not a simple scientific formula, and its exact modality should not be overclaimed. Allah creates male and female through the means He decrees, and modern genetics describes one of those means as the X- or Y-bearing sperm that fertilizes the ovum.

Misconception 4: "If the hadith were true, a child would look only like one parent and not a mix." The hadith doesn't mean a child gets 100% of looks from one parent. We all see children who are a blend. The wording "the child will resemble him (or her)" means the dominant features tilt toward that parent. Indeed, the Prophet used the example of maternal uncles in one narration ("resemble his maternal uncle"), implying that sometimes traits from the mother's side (not just the mother herself) show up strongly. This is exactly what happens with inheritance: a child may get one parent's eye shape and the other's nose, or even a grandparent's features. The hadith addresses the general case where people notice a child strongly resembling one parent or the other. It doesn't deny that the child also inherits from the other parent; that simply wasn't the focus of the question being asked.

To sum up, when properly understood, the hadiths present a scenario that is broadly in line with the basic facts of heredity. They were never meant to be a biology textbook detailing every nuance of inheritance. Rather, they conveyed basic truths: both mother and father contribute, one may prevail in likeness, and even ancestors' traits can appear. Any apparent conflict with science stems from misreading, from taking observational language too literally, or from over-claiming on the defender's side. Once clarified through Arabic linguistics, careful biology, and scholarly explanation, the hadiths hold up well. This brings us to an important point: how could a man in the 7th century say these things at all?

Knowledge Beyond the 7th Century

Imagine living in Arabia in the year 620 CE. There were no microscopes, no chromosomes, and no modern concept of eggs or genes. Learned ancient theories were diverse: Aristotle gave the male seed the formative role, while Hippocratic and Galenic traditions spoke in different ways about contributions from both male and female fluids. None of these theories amounted to modern genetics. Against that background, the prophetic narrations stand out for Muslims not as a laboratory description of DNA, but as revealed guidance that affirms maternal contribution, inherited resemblance, and caution against unjust suspicion.

Let's recap what is genuinely significant, while stating each point carefully:

• He affirmed that the woman has a real reproductive contribution and that it is connected to the child's resemblance (Sahih Muslim 311). This should be appreciated without overstating the history: Aristotle minimized the female contribution, while other ancient physicians did speak of female "seed" or female fluid. Modern biology identifies the mother's hereditary contribution specifically as the ovum, which carries her DNA into the child, not the visible discharge mentioned in the wet-dream context.
• He explained why a child can look like one side of the family by describing one parental contribution as preceding, rising above, or prevailing over the other. This should not be equated simplistically with Mendel's technical dominant/recessive theory; rather, it is a broader statement that visible resemblance may incline toward one parental side.
• He gave a reasonable explanation for an unexpected trait (like skin color) appearing in a child, using the example of the camel's ancestry. The general observation that traits can run in lineages was known in human experience, but the prophetic use of that observation was morally powerful: it protected a family from suspicion and agrees with the established reality that inherited traits can be hidden and later appear.

In the Abdullah ibn Salam report, the Prophet Muhammad (PBUH) said that Gabriel had just informed him of the answers, and Abdullah ibn Salam accepted the answers as true before embracing Islam. In the separate Thawban report, the Jewish questioner is the one who says that such matters are known only to a prophet or to very few people. The safest way to present the context is that these answers were received by the questioners as prophetic knowledge, and the Prophet Muhammad (PBUH) attributed his answers to revelation.

We should describe the significance of all this with care:

These narrations are significant because they affirm a maternal contribution to resemblance and the reality of inherited family resemblance and hidden ancestral traits, in a pre-modern setting that did not understand any of this. The precise biological mapping, however, requires care: the mother's genetic contribution is carried by the ovum, not by the visible discharge mentioned in the wet-dream context.

For Muslims, this is faith-affirming: a 7th-century man in Arabia affirmed truths about heredity that fit well with much later discoveries. At the same time, an honest defense does not claim more than the texts support. We do not need to say the hadith "described exactly" modern genetics, that it "aligns perfectly," or that it is a flawless biology lesson. What we can say is that its core affirmations both parents contribute, one contribution may prevail, and ancestral traits can reappear are sound, and remarkable for their time. The Quran itself reminds us, "He (the Prophet) does not speak from his own desire. It is nothing except a revelation sent down to him" (53:3-4).

Muslims do not claim the hadith explains everything about heredity only that what it affirms is sound. This humility is part of the faith: recognizing the significance without exaggerating it.

Conclusion: Embracing the Wisdom in Light of Faith and Science

So, did Prophet Muhammad (ﷺ) say that child resemblance is not based on DNA? Not in those words, and not in substance either. He taught principles consistent with how inheritance works long before anyone knew what DNA was. He explained them in a way his listeners could grasp, and it is our job to interpret those teachings carefully with the knowledge we have today neither dismissing them nor over-claiming on their behalf.

For Muslims today, these hadiths are a reminder that religious knowledge and scientific knowledge can harmonize. When we encounter a narration that seems odd, we shouldn't rush to dismiss it. Instead, we explore its authentic meaning often by looking at the original Arabic and scholarly explanations and consider it in the light of established facts. In the case of the child-resemblance hadith, much of the confusion lifts once we are precise about both the Arabic and the biology.

That precision is the heart of an honest defense:

The hadith should not be read as saying that visible female wet-dream fluid is the egg cell, or that it literally contains the mother's reproductive genome. Rather, the hadith affirms that the woman has a real reproductive contribution connected to resemblance. Modern biology identifies the mother's hereditary contribution as the ovum, while the prophetic wording speaks in the observable language of "water" and "dominance."

What does this mean for our faith? It strengthens it. The Prophet's teachings here are not disproven by science; their core affirmations anticipated truths that humans worked out in detail much later. This increases our reverence for the Prophet and our conviction that he was guided by the Creator the One who designed DNA and heredity. It also teaches us humility: the Quran and Sunnah may carry layers of meaning that unfold over time, and we honor them best by reading them accurately rather than forcing every word into a modern textbook.

As believers, we approach such narrations with an open mind and the assumption that any authentic statement of the Prophet is true, even when we don't grasp every detail immediately. With time and careful research, the wisdom becomes clear. And even before science explained it, Muslims benefited from the guidance for example, the Bedouin saved his marriage by trusting the Prophet's reasoning.

In conclusion, Prophet Muhammad (PBUH) never mentioned "DNA," but what he said about why a child may resemble one parent or one family side is broadly consistent with heredity when read carefully. Rather than saying resemblance is unrelated to inherited parental contribution, he affirmed a real contribution connected to both the man and the woman, with one side sometimes prevailing in visible likeness. Modern genetics explains the detailed mechanism through DNA in the sperm and ovum; the hadith gives the principle in the observational language of "water," precedence, and predominance. His words, understood correctly and without exaggeration, complement our understanding of biology. For Muslims, this is an invitation to appreciate the depth of the prophetic wisdom, to defend it honestly, and to approach seemingly puzzling narrations with both reverence and inquiry.