Is it common to have no ear lobes?
Free earlobes are the most common form of ear lobes in humans. If the parents’ genes express the dominant allele, the child will be born with free earlobes. In most cases, the allele is regnant to the free lobes compared to attached lobes.
What does it mean if you have no earlobes?
You know you’re unique based on your fingerprint, but have you ever thought about how different your earlobe is? Turns out, no one has the same exact earlobes as the next person. Kind of shocking, right? However, there are two different types that we can all identify with: attached and unattached earlobes.
Is unattached earlobes a genetic trait?
They also believed an unattached earlobe was a dominant trait controlled by a single gene. But neither of these “facts” turned out to be totally accurate. The way an earlobe connects to your head is influenced by multiple genetic variations, many of which are unknown. This results in varying angles of attachment.
What is the genotype for unattached earlobes?
Ee
If a person’s genotype was Ee, then their phenotype would be unattached earlobes.
Do earlobes have a purpose?
Earlobes do not serve a known biological function. The large blood supply in the earlobes may contribute to keeping the ear warm. Studies have found that earlobes continue to grow as people age.
Is Free 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 percentage of people have unattached ear lobes?
Free earlobe was found among 41.1% males and 33.3% females on the left ear and 10% males and 9.2% females on the right ear of the present study.
What is the chance that their child would have unattached earlobes?
That child will have free earlobes. There are two boxes with “Ee” which means that there is a 50% chance (two 25%s combined) that the child will get “Ee”, one dominant gene and one recessive gene. That child will have free earlobes, but will carry the gene for attached earlobes, just like her parents.
Can two parents with attached earlobes have a child with unattached 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.