Homozygosis

Homozygosis [ Genetics ]
Adjective: Homozygotic
Noun: Homozygosity
Synonym: Truebreeding - purebred

Dictionary of botanic terminology
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Homozygosis:

The union of gametes identical for one or more pairs of genes, resulting in the formation of a homozygote.

Homozygote:

An organism with two or more identical alleles on homologous chromosomes.

Homozygous:

The state of having two identical alleles of a particular gene gene for a particular trait (eg AA, aa) at the same locus on both members of a pair of homologous chromosomes.

An homozygote or hemizygote is an individual organism who has the same alleles (gene copies containing identical information) at a given genetic locus, one on each chromosome of a pair. An individual can be homozygous for the normal copies of the gene or can be homozygous for the mutated copies of the gene. it is therefore pure for any given trait. Individuals who are homozygous for a trait are referred to as homozygotes.

vs. heterozygous: since each individual carries two of these alleles, they can either be identical (homozygous) or different (heterozygous) "Homo" means "same" while "hetero" means "different"

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