diploid to sporulate. When you score each spore in the ascus you find the following portions: 518 PD, 8 NPD, and 225 T. What are the genotypes of each spore in all three types of the tetrads. Are these genes linked why or why not? If these genes are unlinked what would you expect the progeny numbers and ratios to

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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You cross two yeast strains one is an ade auxotroph the other is a pro auxotroph and allow
the diploid to sporulate. When you score each spore in the ascus you find the following
proportions: 518 PD, 8 NPD, and 225 T.
a.) What are the genotypes of each spore in all three types of the tetrads.
b) Are these genes linked why or why not?
c.) If these genes are unlinked what would you expect the progeny numbers and ratios to
be?
d.) What is the formula to determine the most accurate distance between these genes? If
linked what is the map distance?
Transcribed Image Text:You cross two yeast strains one is an ade auxotroph the other is a pro auxotroph and allow the diploid to sporulate. When you score each spore in the ascus you find the following proportions: 518 PD, 8 NPD, and 225 T. a.) What are the genotypes of each spore in all three types of the tetrads. b) Are these genes linked why or why not? c.) If these genes are unlinked what would you expect the progeny numbers and ratios to be? d.) What is the formula to determine the most accurate distance between these genes? If linked what is the map distance?
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