in Drosophila, the gene w specifies eye color. Widy pe allele w+ gives red eyes and is dominant me Sives rocal v species white ye cool. with me led t gives red and in is type allie m+ gives normal wing whereas the recessive allele m specifies miniature wing. Both genes are on the X chromosome. If you cross a female fly (red eye, normal wing) with a male fly (white eye, miniature wing), you get a total of 100 progeny, 41 red eye + miniature wing, 45 white eye + normal wing, 6 white eye, miniature wing, and 8 red eye, normal wing. In each category, both males and female are present, at roughly equal proportions. a). Which ones are parental types and which ones are recombinants? b). Are the two mutant alleles w and m in cis or in trans in the female parent? Why? c). What is the genetic distance between the two genes? Please show your calculations.
in Drosophila, the gene w specifies eye color. Widy pe allele w+ gives red eyes and is dominant me Sives rocal v species white ye cool. with me led t gives red and in is type allie m+ gives normal wing whereas the recessive allele m specifies miniature wing. Both genes are on the X chromosome. If you cross a female fly (red eye, normal wing) with a male fly (white eye, miniature wing), you get a total of 100 progeny, 41 red eye + miniature wing, 45 white eye + normal wing, 6 white eye, miniature wing, and 8 red eye, normal wing. In each category, both males and female are present, at roughly equal proportions.
a). Which ones are parental types and which ones are recombinants?
b). Are the two mutant alleles w and m in cis or in trans in the female parent? Why?
c). What is the genetic distance between the two genes? Please show your calculations.
d). A third gene vg on the X chromosome is 3 cM apart from the w gene. Please draw out two possible orders of the three genes on the X chromosome.
Step by step
Solved in 5 steps with 2 images
