Homozygosis

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Related to homozygotic: monozygotic, Monozygotic twins

Homozygosis

 

the state of the genetic apparatus of an organism in which homologous chromosomes have the identical form of a given gene. The transition of a gene into the homozygous state leads to the manifestation in the organism’s structure and function (phenotype) of recessive alleles, whose effect in heterozygosis is suppressed by the dominant alleles. A test for homozygosis is the absence of splitting in certain forms of crossbreeding. A homozygous organism produces only one form of gamete for a given gene.

References in periodicals archive ?
In our case, the mutation was homozygotic S52N on the 3rd exon of the MVK gene (Figure 1).
The mean concentrations of total cholesterol, LDL cholesterol and apo B were highest in the E4/4 homozygotes and the lowest concentrations were observed in E2/2 homozygotic individuals (92).
In the case of PON1 polymorphisms, the table shows the effect of being homozygotic.
Two of the genotypes associated with the RS theory are said to be homozygotic because the alleles for the right-shift gene match, i.