Science Fair Project Encyclopedia
Homozygote
Homozygote 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 on the two corresponding chromosomes (e.g. the genotype is AA or aa).
A homozygous dominant genotype occurs when a particular locus comprises two alleles for the dominant trait (e.g. AA). A homozygous recessive genotype occurs when a particular locus comprises two alleles for the recessive trait (e.g. aa).
See also: heterozygote.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details