Is unattached earlobes dominant or recessive?
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. Other scientists have reported that this trait is probably due to several genes.
What is the genotype of siblings with free earlobes?
Some people have earlobes than hang, and some people don’t. … That means that you have free hanging earlobes if you inherited the gene for it from at least one of your parents meaning that your genotype is “EE” (both genes for free-hanging lobes) or “Ee” (one gene for free hanging lobes).
What would be the genotype of a man who has free earlobes if his father has attached earlobes?
If your father has attached earlobes, which is recessive, then he has two recessive genes (ee), so you would put an “e” in both of those boxes. If your father has free earlobes, then it could either he might have two “E”s or he might have one of each, “Ee”.
What is the genotype TT?
The genotype is represented by letter combinations, such as TT, Tt, and tt. When an organism has two of the same alleles for a specific gene, it is homozygous (homo means “same”) for that gene. An organism can be either homozygous dominant (TT) or homozygous recessive (tt). … The genotype expresses the phenotype.
Are detached earlobes rare?
Free earlobes are the most common form of ear lobes in humans. This type of earlobe is often large and hangs below the point of attachment to the head. This happens due to the influence of a dominant allele. If the parents’ genes express the dominant allele, the child will be born with free earlobes.
How common are detached earlobes?
Imagine that earlobes often followed a simple dominant/recessive pattern. But not always. Maybe one in every 100 people would have unattached earlobes when his or her parents both have attached ones. If we look at only a dozen people, we are likely to miss this.
Are attached earlobes autosomal recessive?
An individual who cannot curl his tongue is homozygous recessive at another autosomal gene locus.
What is the chance that their offspring will have unattached earlobes?
There is one box with “EE”, so there is a 25% chance (one in four) that each offspring will get “EE”, which means two dominant genes. That child will have free earlobes.
Are ears inherited from mom or dad?
Every person will inherit genes from their parents that affect the shape, size, and prominence of their ears. It is not uncommon to see large, protruding ears passed down from parent to child.