You are doing lab work with a new species of beetle. You have isolated lines that breed true for either blue shells and long antenna or green shells and short antenna. Crossing these lines yields F1 progeny with blue shells and long antenna. Crossing F1 progeny with beetles that have green shells and short antenna yields the following progeny: Assuming that the genes are linked, what is the map distance between them?
Read DetailsJames (I-1) is a 42-year-old man with hemophilia. His daughter, Susan (II-1), who has normal blood clotting, is married to Fred (II-2) who also has hemophilia. Susan and Fred are expecting their first child and an ultrasound shows that the fetus is male. If hemophilia is inherited as a sex-linked recessive condition, what is the approximate probability that their new son will have hemophilia?
Read DetailsShell 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)
Read Details(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
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