having the same allele at the same locus on both members of a pair of homologous chromosomes. Homozygous also refers to a genotype consisting of two identical alleles of a gene for a particular trait. An individual may be homozygous dominant (AA) or homozygous recessive (aa).
Similarly, what is it called when an organism possesses two different alleles for a trait?
An organism's genetic makeup, or allele combinations. heterozygous. Describes an organism that has two different alleles for a trait. homozygous. Describes an organism with two identical alleles for a trait.
What is a cell called when it has 2 identical alleles?
Heterozygous. A diploid organism is heterozygous at a gene locus when its cells contain two different alleles (one wild-type allele and one mutant allele) of a gene. The cell or organism is called a heterozygote specifically for the allele in question, and therefore, heterozygosity refers to a specific genotype.
What is an organism that has two identical alleles for a particular trait?
Organisms that have two identical alleles for a particular trait are said to be homozygous (AA) or (aa). 6. Organisms that have two different alleles for the same trait are heterozygous (Aa).