Gene mapping using the Three-point Testcross a) Given the following alleles that control seed traits: W = wrinkled       G = green    R = round w = smooth        g = yellow     r = oval b) Results of a cross with a triple heterozygote revealed the following phenotypes: 30       smooth yellow round 4         smooth green round 958     wrinkled green round 2         wrinkled yellow oval 18       wrinkled yellow round 946     smooth yellow oval 16      smooth green oval 26      wrinkled green oval c) Determine the order of the genes and the distance between them in centiMorgan (cM). Construct a gene map to show your results. TIP: Based on the phenotypes, determine the alleles in the gametes

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Gene mapping using the Three-point Testcross

a) Given the following alleles that control seed traits:
W = wrinkled       G = green    R = round
w = smooth        g = yellow     r = oval


b) Results of a cross with a triple heterozygote revealed the following phenotypes:
30       smooth yellow round
4         smooth green round
958     wrinkled green round
2         wrinkled yellow oval
18       wrinkled yellow round
946     smooth yellow oval
16      smooth green oval
26      wrinkled green oval


c) Determine the order of the genes and the distance between them in centiMorgan (cM).
Construct a gene map to show your results.

TIP: Based on the phenotypes, determine the alleles in the gametes

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