The complete question is:
An individual with genotype AA is crossed to an individual with genotype aa at the same genetic locus. The allele A is dominant to the allele a.
If the offspring are interbred through two generations, what is the predicted ratio of phenotypes in the F2 generation?
9:16 (dominant:recessive)
9:7 (dominant:recessive)
3:16 (dominant:recessive)
1:3 (dominant:recessive)
Answer:
3:1 dominant:recessive phenotype ratios
Explanation:
The recessive phenotype disappears in the F1 generation, but it reappears in the F2 at a ratio of 3:1, being therefore dominant:recessive
