Could be ee; attached earlobes. The expression of one’s genotype, such as EE, Ee or ee, is called one’s phenotype. For various reasons, certain genes may not express themselves.
Is an attached earlobe a gene?
Earlobe attachment is a genetic trait determined by a single gene—or at least that is what kids learn in school.
What gene causes attached earlobes?
Earlobes of such type are small in size and are attached directly to the side of the head. This kind of lobe’s structural formation is due to the absence of the dominant allele in the chromosomes. The recessive allele is expressed to form an attached earlobe.
Are attached earlobes a Mendelian trait?
A single autosomal gene with two alleles determines whether you have attached earlobes or free-hanging earlobes. The allele for free-hanging earlobes (F) is dominant to the allele for attached earlobes (f).
Are attached earlobes autosomal 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.
Are attached or unattached earlobes more common?
In one of the first earlobe studies, scientists concluded that unattached earlobes were dominant over attached ones. They based this on two families. Everyone in the first family had attached earlobes and everyone in the second had unattached ones.
Can you have an attached and detached earlobe?
So as a person who is aware of basic biology and genetics, it’s possible but very, very unlikely. Attached or detached earlobes are a result of the genes you receive from your parents and how those genes turn on and express.
What means phenotype?
A phenotype is an individual’s observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.
What are the differences between genotypes and phenotypes?
The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.
Is red hair genotype or phenotype?
Red hair is the null phenotype of MC1R.
Which trait free earlobe or the attached earlobes is dominant?
In humans, attached earlobes are a dominant feature over free earlobes while hypertrichosis of the ear is a holandric (Y-linked) feature. A man with attached earlobes and extensive hair on pinna married a woman having free earlobes.
What are dominant and recessive variants about earlobe?
Free earlobe is a dominant trait and attached earlobe is a recessive trait.