1. A corn plant with the genotype, Anan brbr Ff CC Vava shsh, was selfed. What p
ID: 33276 • Letter: 1
Question
1. A corn plant with the genotype, Anan brbr Ff CC Vava shsh, was selfed. What proportion of its progeny would be expected to show the phenotype: non-anther ear, brachytic, fine stripe, colored kernel, nonsterile, shrunken kernels if independent assortment occurred? an = anther ear c = colorless kernels f = fine stripe br = brachytic va = variable sterile sh = shrunken kernels.
2. Coat color in pigs can be white, red or sandy. A cross of pure-breeding sandy with pure-breeding sandy pigs produces all red progeny. These pigs are allowed to mate and produce an F2 with a ratio of 9 red to 6 sandy to 1 white. Propose a model for these results.
Explanation / Answer
1. 1/256
2.This is a case of duplicate genes with cumulative effect. Complete dominance at both gene pairs, interaction between both dominance to give new phenotypes.
Gene pair
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