Shell coiling of the snail Lymnea peregra results from a gen…

Shell coiling of the snail Lymnea peregra results from a genetic maternal effect. An autosomal allele for a right-handed, or dextral shell (s+) is dominant over the allele for a left-handed, or sinistral shell (s). A pet snail called Martha is sinistral and can only reproduce as a female. Determine if each of the following statements is True or False and briefly explain your reasoning to select that answer. A. Martha’s genotype MUST be ss (3.5 points) B. All of the offspring produced by Martha MUST be sinistral (3.5 points) C. All of Martha’s brothers MUST be sinistral (3.5 points)

(Same statement as above: Consider three yellow, round peas,…

(Same statement as above: Consider three yellow, round peas, labeled A, B and C. Each was grown into a plant and crossed with a plant grown from a green wrinkled pea. You obtain exactly 100 peas from each cross (Note: for this question, assume both genes assort independently). C. What is the genotype of plant C if the cross yielded: 24 yellow, round 26 yellow, wrinkled 25 green, round 25 green, wrinkled