Describe clearly the similarities and differences in menopausefor females, as compared to males (remember tocite your sources.) (4 points)
Describe clearly the similarities and differences in menopausefor females, as compared to males (remember tocite your sources.) (4 points)
For unlimited access to Homework Help, a Homework+ subscription is required.
Related textbook solutions
Related questions
Drosophila has four pairs of chromosomes: the sex chromosomes (XX in the females; XY in the males) and three pairs of autosomes. You are studying a new mutant strain with blue eyes. You wish to know if blue eye colour is a dominant mutation and on which chromosome the blue eye locus can be found. When you cross a pure-breeding female blue-eyed fly with vestigial wings and spineless bristles to a male fly with wild type eye colour, wings, and bristles, all of the F1 progeny are completely wild type. An F1 male is backcrossed to a triple mutant female, producing the following progeny (remember that there is no crossing over in Drosophila males):
Wild type eyes, wings, and bristles: | 72 females, 69 males |
Wild type eyes and bristles, vestigial: | 83 females, 77 males |
Wild type wings, blue eyes, spineless: | 60 females, 65 males |
Blue eyes, spineless, vestigial: | 62 females, 58 males |
a. Is the mutation dominant or recessive? Explain.
b. Since you know that the locus for vestigial wings is on chromosome 2 and the locus for spineless bristles is on chromosome 3, what chromosome carries the locus for blue eyes? Show your work, including the step-by-step reasoning you used to arrive at your answer.
c. When an F1 female is backcrossed to a triple mutant male, the following 1,000 progeny are produced:
Wild type eyes, wings, and bristles: | 90 females, 89 males |
Wild type eyes and bristles, vestigial: | 83 females, 98 males |
Wild type eyes and wings, spineless: | 37 females, 35 males |
Wild type wings and bristles, blue eyes: | 36 females, 34 males |
Wild type wings, blue eyes, spineless: | 92 females, 88 males |
Wild type eyes, spineless, vestigial: | 34 females, 39 males |
Wild type bristles, vestigial, blue eyes: | 33 females, 37 males |
Blue eyes, spineless, vestigial: | 90 females, 85 males |
Calculate the map distance between blue eye and any linked genes. Show your work.