Homozygote

A homozygote's cells are diploid or polyploid and have the same alleles at a locus (position) on homologous chromosomes. When an organism is referred to as being homozygous for a specific gene, it means that it carries two identical copies of that gene for a given trait on the two corresponding chromosomes (e.g., the genotype is AA or aa). Such a cell or an organism is called a homozygote.

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A homozygous dominant genotype occurs when a particular locus has two copies of the dominant allele (e.g., AA). A homozygous recessive genotype occurs when a particular locus has two copies of the recessive allele (e.g., aa).

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In humans and many other animals it refers in particular to X-linked genes in males who under usual circumstances have only one X chromosome and are homozygous for all genes that are located on the X-chromosome.

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Cell: A cell is a single unit or compartment, enclosed by a border or wall. A cell is usually part of a larger structure. More specific meanings depend on the context in which the work is used....

Diploid: redirect Ploidy#Diploid...

Polyploid: REDIRECT Polyploidy...