Is unattached earlobes dominant or recessive?

If earlobes hang free, they are detached. If they attach directly to the side of the head, they are attached earlobes. Some scientists have reported that this trait is due to a single gene for which unattached earlobes is dominant and attached earlobes is recessive.

What are dominant and recessive variance about earlobe?

In the case of the earlobe genes, one is dominant over the other. In this case, unattached earlobes are dominant over attached earlobes (the recessive form of this trait) So, the person with gene combination B will have unattached earlobes because the unattached gene dominated over the attached earlobe gene.

Are attached earlobes autosomal recessive?

An individual who cannot curl his tongue is homozygous recessive at another autosomal gene locus.

What gene causes attached earlobes?

The allele for free-hanging earlobes (F) is dominant to the allele for attached earlobes (f). Other single-gene autosomal traits include widow’s peak and hitchhiker’s thumb. The dominant and recessive forms of these traits are shown in Figure below.

Are my earlobes attached or unattached?

If your earlobes form a smooth line where they connect to your head, they are considered attached. If your earlobes form a noticeable notch or angle where they join the head, they are referred to as unattached or free earlobes by some scientists.

Can two parents with unattached earlobes have a child with attached earlobes?

So two parents with attached earlobes should not be able to have a child with unattached ones. Except that sometimes they do. Which means that earlobes are more complicated than is usually advertised. In one of the first earlobe studies, scientists concluded that unattached earlobes were dominant over attached ones.

Is it rare to have one attached earlobe unattached?

No, they won’t have one attached and one unattached. In the case of the earlobe genes, one is dominant over the other. This means that when they are both together, one gene will be expressed and the other will not be expressed.

What race has the biggest earlobes?

Ethnically Indian volunteers had the largest ears (both length and width), followed by Caucasians, and Afro-Caribbeans. This trend was significant in males (p<0.001), but not significant in females (p=0.087). Ears increased in size throughout life.

Can a child have a free earlobe if they have a recessive allele?

In some situations, if the two parents each have one recessive allele for a certain trait, their child can end up displaying the recessive phenotype. This means that both of them can have free earlobes but their child could have attached earlobes.

Why are unattached earlobes dominant in the family?

And members of the same family share even more. So it could very well be that in the family they studied unattached earlobes were dominant because everyone shared the same set of alleles. But a more diverse set of people may follow a different pattern because they have different alleles.

Is the size of the earlobes an inherited trait?

Some scientists have reported that this trait is due to a single gene for which unattached earlobes is dominant and attached earlobes is recessive. Other scientists have reported that this trait is probably due to several genes. The size and appearance of the lobes are also inherited traits.

Can a person with a free earlobe have an attached child?

The free earlobe parents can also give birth to an attached earlobe child, depending on the reaction of the allele gene. If parents with free earlobes give birth to a baby with attached earlobes, it is certain that both of them had both a copy of the dominant and recessive allele.