Homozygosis


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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 ?
Table 6 - Estimates of heterozygosis and homozygosis in the population studied
With the loss of the p53 homozygosis, the damage DNA is not repaired and there is marked proliferation of the mutation, genomic instability and loss of important cell cycle control mechanisms, being the cell led to malignant transformation (SANCHEZSERVIN et al.
It is important to note that homozygosis on rare allele genotype A/A was not detected in any group of observed patients.
In order to maintain healthy laboratory rearing regimes, a number of factors should be taken into consideration, including deterioration, excessive homozygosis, or other divergences from the original population (Joslyn 1984).
Relation between yielding ability and homozygosis in barley crosses.
Genetic analysis showed heterozygous or homozygosis mutations in the ETFDH gene [Supplementary Table 1] [SUPPORTING:1].