The trait for medium-sized leaves in iris is determined by the genetic condition PP?. Plants with large leaves are PP, whereas plants with small leaves are P?P?. The trait for red flowers is controlled by the genes RR, pink by RR?, and white by
R?R?. A cross is made between two plants each with medium-sized leaves and pink flowers. If they produce 320 seedlings, what would be the expected phenotypes, and in what numbers would they be expected? Assume no linkage.
A) 40 large, red; 20 medium, red; 40 small, red; 20 large, pink; 80 medium, pink; 20 small, pink; 40 large, white; 20 medium, white; 40 small, white
B) 20 large, red; 40 medium, red; 20 small, red; 80 large, pink; 40 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white
C) 80 large, red; 40 medium, red; 20 small, red; 40 large, pink; 20 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white
D) 20 large, red; 40 medium, red; 20 small, red; 40 large, pink; 80 medium, pink; 40 small, pink; 20 large, white; 40 medium, white; 20 small, white
E) 35 large, red; 35 medium, red; 35 small, red; 35 large, pink; 35 medium, pink; 35 small, pink; 35 large, white; 35 medium, white; 35 small, white
Answer: D
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