In a species of tortoise, foot size (big or smal) is controlled by one gene, while shell shape (round or lumpy) is controlled by another gene. Suppose that a big-footed lumpy-shelled tortoise mates with a small-footed round-shelled tortoise. Eight offspring result: four big-footed round-shelled tortoises and four small-footed round-shelled tortoises. (Assume that the parents are not necessarily homozygous for each allele.)
1. Which statement about the inheritance of shell shape in tortoises is most likely to be correct, given your genetic analysis of the tortoise family?
A) Lumpy is dominant to round
B) Round is dominant to lumpy
C) Round and lumpy are codominant.
D) Shell shape is an example of blending inheritance
E) This cannot be answered without more information.
2. If big feet (B) in tortoises is dominant to small feet (b), what is the genotype of the big-footed parent with respect to the foot gene?
A) bb
B) вв
C) Bb
D) Either bb or BB
E) Either bb and Bl