In Drosophila, a gene controls body color producing either normal body color or the mutant form black body color (bl. A second gene controls wings. The flies either have normal wings or are wingless (wn). A cross is made between a homozygous wild type fly and fly with black body and wingless. A test cross was then performed. The following progeny was observed: Phenotype # Observed Wild Type 405 Normal, wingless 85 Black, normal 100 Black, wingless 410 A. List the genotypes of the original parents B. List the genotypes of the testcross. C. Are these two genes linked? How do you know?

Human Anatomy & Physiology (11th Edition)
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In Drosophila, a gene controls body color producing either normal body color or the mutant form black body color (bl. A second
gene controls wings. The flies either have normal wings or are wingless (wn). A cross is made between a homozygous wild type
fly and fly with black body and wingless. A test cross was then performed. The following progeny was observed:
Phenotype
# Observed
Wild Type
405
Normal, wingless 85
Black, normal 100
Black, wingless 410
A. List the genotypes of the original parents.
B. List the genotypes of the testcross.
C. Are these two genes linked? How do you know?
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Transcribed Image Text:In Drosophila, a gene controls body color producing either normal body color or the mutant form black body color (bl. A second gene controls wings. The flies either have normal wings or are wingless (wn). A cross is made between a homozygous wild type fly and fly with black body and wingless. A test cross was then performed. The following progeny was observed: Phenotype # Observed Wild Type 405 Normal, wingless 85 Black, normal 100 Black, wingless 410 A. List the genotypes of the original parents. B. List the genotypes of the testcross. C. Are these two genes linked? How do you know? Edit Format Table 12pt v Paragraph v BIUA
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