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, progeny?

a.1g
b. 4g
c. 8g
d. 10g
e. 16g

Answer 1

10g

Step-by-step explanation:

A cross between genotype AA BB is crossed with a plant with genotype aa bb will produce

Parent genotype:AABB x aabb

Gametes: AB x ab

F1 generation - AaBb

Since an uppercase letter contributes 4 g to weight and each allele represented by a lowercase letter contributes 1 g to weight.

Thus, 4+1 + 4 + 1 = 10g