Starting with the parental cross AA bb × aa BB, what proportion of the F2 offspring is expected to be homozygous at least one of the two genes? Show your work with Punnnett square and without punnet square.
Starting with the parental cross AA bb × aa BB, what proportion of the F2 offspring is expected to be homozygous at least one of the two genes?
Show your work with Punnnett square and without punnet square.
Dihybrid Cross:
A dihybrid cross is a cross between two individuals who differ in two features controlled by two separate genes. If both parents are homozygous for both genes, the offspring will be uniformly heterozygous for both genes and have the dominant phenotype for both traits. Self-pollination or cross-pollination of these individuals will provide predictable genotype and phenotypic ratios in the generation. Deviations from these expected ratios could indicate that the two qualities are connected, or that one or both traits have a non-Mendelian inheritance mechanism.
The F2 offspring of the cross have a phenotypic ratio of 9:3:3:1, with 9/16 of the F2 individuals having the dominant phenotype for both traits and 1/16 having recessive phenotypes for both traits.
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