CAPE Biology Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q21

Mendel crossed pure-breeding round and yellow peas with pure-breeding wrinkled and green peas. The \text{F}_1 seeds were round and yellow. The \text{F}_1 seeds were self-pollinated and the seeds of the \text{F}_2 showed the following characteristics. 315 round and yellow 101 wrinkled and yellow 108 round and green 32 wrinkled and green The appearance of the new combinations of characteristics, round and green, and wrinkled and yellow is due to

1. (A)dominant epistasis
2. (B)independent assortment of the alleles for colour and shape
3. (C)the genes for colour and shape being on the same chromosome
4. (D)multiple alleles