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In Drosophila, the gene w specifies eye color. Wildtype allele w+ gives red eyes and is dom -ecessive allele w specifies white eye color. The gene m specifies wing size and the wildtype allele m- ives 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 ving), 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 b). Are the two mutant alleles w and m in cis or in trans in the female parent? Why?

In Drosophila, the gene w specifies eye color. Wildtype allele w+ gives red eyes and is dom -ecessive allele w specifies white eye color. The gene m specifies wing size and the wildtype allele m- ives 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 ving), 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 b). Are the two mutant alleles w and m in cis or in trans in the female parent? Why?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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In Drosophila, the gene w specifies eye color. Wildtype allele w+ gives red eyes and is dominant. The recessive allele w specifies white eye color. The gene m specifies wing size and the wildtype allele 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,
Transcribed Image Text:In Drosophila, the gene w specifies eye color. Wildtype allele w+ gives red eyes and is dominant. The recessive allele w specifies white eye color. The gene m specifies wing size and the wildtype allele 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,
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