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, which was itself ahead of its time. 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. However, the key Arabic words the Prophet used carry the meaning of prevailing or dominating not just coming out first in time. In one narration, the phrase is "فَأَيُّهُمَا عَلا أَو سَبَقَ يَكُونُ مِنْهُ الشَّبَهُ", which translates to "whichever of the two rises above or precedes, the resemblance will be from that one." The word "ʿalā (عَلا)" literally means to rise above or overcome, and "sabaqa (سَبَقَ)" means to precede.

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 (māʾ) "water" or "fluid" and the verb is ʿalā 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" (ʿulūw) 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.

This means the phrase "discharges first" is a simplified way of saying "whichever parent's contribution dominates in the creation of the baby." The Prophet conveyed it in terms his listeners could relate to, but the underlying concept is about dominance in contribution. Modern genetics gives us one plausible way to make sense of "prevailing traits," but it does not prove that the visible fluid 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 amshāj," meaning a mixed drop. Early Muslim commentators explained this as the mingling of the man's and woman's fluids essentially what we understand today as the combining of genetic material from both parents to form a new life.

Other verses emphasize that both genders come from this process by Allah's will. Surah An-Najm mentions that God "creates the two mates (the male and the female) from a sperm-drop when it is emitted." Here the Quran points to an emitted drop as the origin of male and female. We now know it is specifically the sperm that carries the X or Y chromosome which determines sex, which fits the verse's emphasis on the emitted drop from the man. Surah Al-Qiyamah (75:37-39) describes the stages of creation: it asks, "Was he (the human) not a nutfah (drop) of semen emitted? Then he became an ʿalaqah (clinging form), then (Allah) shaped and fashioned him, and made of him the two genders, male and female." This shows that from that initial union of fluids, Allah forms a child as male or female.

While these verses don't explicitly talk about resemblance (which specific parent the child looks like), they strongly affirm the idea that both a mother and a father are involved in a child's origin, and the outcome (gender and features) is by Allah's decree at that earliest stage. The Quran also says "O mankind, We created you from a male and a female…" (49:13) highlighting that everyone comes from both a man and a woman. So Islamic scripture acknowledges the dual contribution in human creation, which is consistent with biological reality.

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 man himself was of lighter complexion, as was his wife, so he immediately thought his wife might have been unfaithful (since the child didn't look like either parent). 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."

When the man heard this, he understood and accepted the explanation. His doubts about his wife vanished because the Prophet made it clear that a trait can reappear after skipping a generation or many generations what modern genetics would explain through inherited traits that may be hidden in parents and appear later in descendants. Just as a camel might be born a different color because some ancestor carried that trait, a human child can resemble a grandparent or more distant ancestor more than the immediate parents. In this case, apparently some ancestral trait in the man's lineage had appeared in his newborn, and it was perfectly natural.

This hadith is recorded in both Bukhari and Muslim, underlining its authenticity. It demonstrates the Prophet's wisdom in solving real-world issues using the concept of heredity. Consider that in the 7th century, most people had no idea why a child would look so unlike his parents, and many would jump to wrong conclusions (like infidelity). The Prophet's analogy saved a family from turmoil he essentially taught that children can carry traits that were not visible in the previous generation. This fits well with what we now understand about inherited traits that can stay hidden for one or more generations and then reappear.

For the companions of the Prophet, this was further proof of his God-given knowledge. He explained inheritance in a way that was easily understood using camels as an example to a camel-herding people and it accords with the general principle that traits can be passed down and reappear across generations. The Bedouin man was convinced by this sound analogy, and it prevented an unjust accusation.

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 "ʿalā" 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." There is a variant of the hadith (narrated by Thawban, another Companion) where the Prophet is reported to have said: "If the man's fluid prevails, the child will be male by Allah's permission. If the woman's fluid prevails, the child will be female." This has caused confusion, since we know scientifically that the sperm's chromosome (X or Y) decides the sex. Scholars have addressed this in two ways.

Firstly, many scholars believe this wording about male/female was not the Prophet's original words but perhaps an insertion or misunderstanding by a narrator. Shaykh al-Islam Ibn Taymiyyah and others pointed out that the authentic core hadith (found in Bukhari and Muslim) only spoke about resemblance, while the mention of gender comes from a less clear chain. The Prophet, in their view, did not say that a woman's fluid prevailing makes a girl; rather, he only spoke about similarity. This opinion is supported by the fact that the Qur'an and observable science attribute sex determination to the father's contribution (the sperm carrying X or Y), and that ultimately it is by Allah's command.

Secondly, other scholars tried to reconcile the report by interpreting "prevailing of fluid" in terms of the biological environment. There are unproven theories that the timing of intercourse relative to ovulation or the pH of cervical mucus might slightly favor one type of sperm, but these are not conclusive. The most straightforward explanation remains that the core hadith was about resemblance, not gender and that one narrator mixed the two topics. Importantly, no authentic Islamic teaching contradicts the fact that sperm determines the baby's sex (consistent with Quran 53:45-46). The central message of the resemblance hadith is about appearance, and it stands.

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 are no microscopes, no concept of eggs or genes. The prevalent idea among learned people (inherited from ancient Greek theories) was either that only the male's "seed" creates the baby, or some vague mixing of fluids without any precise mechanism. Against that background, the prophetic narrations stand out and Muslims see in them a sign of his prophethood.

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 plays a role in the child's traits (Sahih Muslim 311). This was not obvious in his time; Aristotle, for instance, thought the woman contributed no "seed" of her own. 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 prevailing over the other. The detailed theory of dominant and recessive inheritance was only developed with Gregor Mendel's work in the 19th century, yet the basic idea that one parent's contribution can prevail is present in the hadith.
• 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 idea that traits can be inherited from distant ancestors and reappear is firmly established today, but it was certainly not common knowledge then.

It's also noteworthy that when the Jewish scholar quizzed him, the Prophet did not hesitate; he said that the angel Gabriel had just informed him of the answers. After the rabbi confirmed those answers, the Prophet remarked that these were matters only a prophet or someone taught by God could know. This context shows that these answers were received as knowledge from revelation, which is how the Prophet himself described them.

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 (ﷺ) never mentioned "DNA," but what he said about why a child resembles one parent is consistent with the science of heredity, once we read it carefully. Rather than saying resemblance isn't based on DNA, he affirmed that it depends on a real, prevailing contribution from each parent which is exactly what we now describe in terms of genetic inheritance. 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.