MUTATION IN PEAS THAT CAUSES MOTTLED FLOWER COLOR. SHE CALLS THIS MUTATION SPOTTY AND DETERMINES THAT IT IS DUE TO AN AUTOSOMAL RECESSIVE ALLELE (S). SHE WANTS TO DETERMINE WHETHER THE GENE ENCODING SPOTTY IS LINKED TO THE RECESSIVE GENE FOR FLOWER COLOR (WHITE, W, IS RECESSIVE TO PURPLE). SHE CROSSES A PLANT HETEROZYGOUS FOR BOTH TRAITS WITH A PLANT HOMOZYGOUS RECESSIVE FOR BOTH TRAITS AND OBTAINED THE FOLLOWING PROGENY: NORMAL, PURPLE: 86 NORMAL, WHITE: 14 SPOTTY, PURPLE: 10

Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter20: Chromosomes And Human Genetics
Section: Chapter Questions
Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....
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A GENETICIST DISCOVERS A NEW MUTATION IN PEAS THAT CAUSES MOTTLED FLOWER COLOR. SHE CALLS THIS MUTATION SPOTTY AND DETERMINES THAT IT IS DUE TO AN AUTOSOMAL RECESSIVE ALLELE (S). SHE WANTS TO DETERMINE WHETHER THE GENE ENCODING SPOTTY IS LINKED TO THE RECESSIVE GENE FOR FLOWER COLOR (WHITE, W, IS RECESSIVE TO PURPLE). SHE CROSSES A PLANT HETEROZYGOUS FOR BOTH TRAITS WITH A PLANT HOMOZYGOUS RECESSIVE FOR BOTH TRAITS AND OBTAINED THE FOLLOWING PROGENY:
NORMAL, PURPLE: 86 NORMAL, WHITE: 14 SPOTTY, PURPLE: 10 SPOTTY, WHITE: 90
• WHAT ARE THE GENOTYPES FOR EACH OF THESE FOUR PROGENY TYPES?
• WHICH ALLELES ARE FOUND ON EACH CHROMOSOME OF THE DOUBLE HETEROZYGOTE PARENT? (USE SLASH NOTATION.)
• WHAT IS THE DISTANCE IN CM BETWEEN THESE TWO GENES?

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