A homozygous fly with two recessive mutations causing purple body and short wings (ppss) is mated with a fly heterozygous for both mutations (p+p and s+s): "+" represents the wild-type allele. They have the following offspring:   26   Wild type (normal body, normal wings) 345   Purple body, normal wings 376   Normal body, short wings   13   Purple body, short wings What is the allele arrangement (haplotype) for the heterozygous parental fly? ("p" designates the mutant allele; "p+" designates the wild-type allele.) Image with alt text: a) Double stranded D N A with top strand marked p and s plus, lower strand marked p plus and s.

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Chapter20: Chromosomes And Human Genetics
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Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....
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A homozygous fly with two recessive mutations causing purple body and short wings (ppss) is mated with a fly heterozygous for both mutations (p+p and s+s): "+" represents the wild-type allele. They have the following offspring:

  26   Wild type (normal body, normal wings)

345   Purple body, normal wings

376   Normal body, short wings

  13   Purple body, short wings

What is the allele arrangement (haplotype) for the heterozygous parental fly? ("p" designates the mutant allele; "p+" designates the wild-type allele.)

  • Image with alt text: a) Double stranded D N A with top strand marked p and s plus, lower strand marked p plus and s.
  • Image with alt text: c) Double stranded D N A with top strand marked p and p, lower strand marked s plus and s plus.
  • Image with alt text: b) Double stranded D N A with top strand marked p plus and s plus, lower strand marked p and s.
  • Image with alt text: d) Double stranded D N A with top strand marked p plus and p, lower strand marked s plus and s.
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