Dictionary > Genotypic ratio

Genotypic ratio

Definition
noun
Pattern of offspring distribution according to genotype (i.e. the genetic constitution determining the phenotype of an organism)
Supplement
The genotypic ratio describes the number of times a genotype would appear in the offspring after a test cross. For example, a test cross between two organisms with same genotype, Rr, for a heterozygous dominant trait will result in offspring with genotypes: RR, Rr, and rr. And in this example, the predicted genotypic ratio is 1:2:1.
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