7) You are performing crosses in your experimental animal and find the following

Question

7) You are performing crosses in your experimental animal and find the following: Cross Phenotypic ratio of progeny l) yellow female x brown male 2 brown:I yellow 2) yellow female x brown male 2 brown1 yellow: 1 rust ) brown female x rust male 1 brown: 1 vellow A. How many genes are involved? B. What are the dominance patterns for the alleles? C. Suppose when the yellow progeny from cross 1 was mated to the yellow progeny of cross 2, the phenotypic ratio of the progeny was 2 yellow:1 rust. What were the genotypes of the parents?

Explanation / Answer

a. total 2 genes are involved i.e., yellow and brown genes respectively.

b. present results show the incomplete dominance of alleles thus resulting in rust phenotype.

c. genotypes of parents- BB(brown), bb(yellow) Bb(rust)

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