If an individual with a dominant phenotype is crossed with an individual with a recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first parent?
a. AA
b. Aa
c. aa
d. The answer cannot be determined from this information.

The presence of both dominant and recessive progeny suggests that the dominant parent should be heterozygous for the trait under study. Let's assume that the genotype of the dominant parent is "Aa" and that of the recessive parent is "aa". A cross between these two parents should obtain both dominant and recessive progeny in 1:1 ratio.

According to the given information, the phenotype ratio of the obtained progeny was around 1 dominant: 1 recessive.

If an individual with a dominant phenotype is crossed with an individual with a recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first parent? a. AA b. Aa c. aa d. The answer cannot be determined from this information.

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If an individual with a dominant phenotype is crossed with an individual with a recessive phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first parent?
a. AA
b. Aa
c. aa
d. The answer cannot be determined from this information.