What is it called when someone has two alleles for the same trait?

What is it called when someone has two alleles for the same trait?

Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ.

When the two alleles for a trait are the same?

Both alleles for a trait are the same in an individual. They can be homozygous dominant (YY), or homozygous recessive (yy). heterozygous; usually referring to the offspring of two true-breeding (homozygous) individuals differing in the traits of interest.

How many alleles do you have for each trait?

For each trait studied by Mendel , there were only 2 possible alleles per gene. However, it is possible to have more than 2 alleles per gene. Many genes have multiple alleles. For 2 alleles, the dominant allele is expressed over the recessive. For multiple alleles, a dominance hierarchy exists, determining which allele will be expressed.

When more than two alleles control a trait is called?

A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color. It is important not to confuse polygenic with multiple alles. In that case one gene has more than two alleles.

What is the difference between an allele and a trait?

The main difference between allele and trait is that an allele is an alternative form of a particular gene whereas a trait is the character that is determined by the allele. A particular allele carried by an individual is referred to as the genotype of that individual while the trait expressed by…

When is organism has two identical alleles for a trait?

Diploid organisms typically have two alleles for a trait. When allele pairs are the same, they are homozygous. When the alleles of a pair are heterozygous, the phenotype of one trait may be dominant and the other recessive.