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ProblemSet5 - Reinagel BICD100 Genetics Problem Set 5:...

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BICD100 Genetics Fall 2005 Problem Set 5: Linkage and Maps 1. In a plant, leaf color and leaf shape are controlled by two linked genes. Leaves of the wild-type plant are red. A recessive mutation in this gene causes white leaves. Wild-type leaves are pointed, and a recessive mutation in this gene causes them to be smooth. The following crosses were performed: Cross 1: pure breeding white, smooth X pure breeding wild type gives F1: all red, pointed Cross 2: red, pointed F1 X pure breeding white, smooth (test cross) gives F2: 40 white, smooth 36 red, pointed 10 white, pointed 14 red, smooth What is the recombination frequency between the gene for color and for shape? 2. In pea plants, the peas can be either rough or smooth, and either soft or hard. You do some crosses and obtain the following results. cross 1: purebred rough, soft pea X purebred smooth, hard pea gives F1: all rough, hard cross 2: rough, hard F1 X smooth, soft ( note: test cross, NOT self cross) gives F2: 115 rough soft 110 smooth hard 8 rough hard 12 smooth soft a) using letters of your own choosing, state the genotypes of the parents, the F1, and each phenotypic class in the F2. b) which F2 progeny inherited parental type gametes from the F1 parent, and which nonparental type? c)
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This note was uploaded on 08/30/2008 for the course BICD 100 taught by Professor Nehring during the Fall '08 term at UCSD.

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ProblemSet5 - Reinagel BICD100 Genetics Problem Set 5:...

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