Answer:
A cross between two heterozygote individuals, Aa x Aa
Explanation:
A cross between two heterozygotes individuals would produce a 1:2:1 ratio of genotypes and a 3:1 ratio of phenotypes. This is a case of complete dominance of one of the alleles over the other one. In this case, the allele A completely dominates over the allele a.
The cross would be like:
Parental) Aa x Aa
Gametes) A a A a
Punnet Square)
A a
A AA Aa
a Aa aa
The F1 genotype proportions are: 1/4 Homozygous dominant, AA
2/4 Heterozygous, Aa
1/4 Homozygous recessive, aa
The F1 phenotype proportions are: 3/4 of individuals expressing the
dominant trait.
1/4 of individuals expressing
the recessive trait.
