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In Drosophila, a heterozygous female for the X-linked recessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred in the following
No other phenotypes were observed.
- (a) What is the genotypic arrangement of the alleles of these genes on the X chromosome of the female?
- (b) Determine the correct sequence and construct a map of these genes on the X chromosome.
- (c) What progeny phenotypes are missing? Why?
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