Question

Assume that plant weight is determined by a pair of alleles at each of two independently assorting loci (A and a, B and b) that are additive in their effects. Further assume that each allele represented by an uppercase letter contributes 4 g to weight and that each allele represented by a lowercase letter contributes 1 g to weight. If a plant with genotype AA BB is crossed with a plant with genotype aa bb, what weights are expected in the F_a progeny?

A. 1 g
B. 4 g
C. 8 g
D. 10 g

Answer 1

D.

Step-by-step explanation:

Answer 2

Answer: choice D. 10g

Step-by-step explanation:

The cross is AABB x aabb so the F1 progeny would have AaBb genotype.

The question states that dominant alleles(uppercase letters) contribute 4g and recessive ones contribute 1g to the weight of the plant.

so for AaBb we would have 4+1+4+1=10g.