A cross was performed in Neurospora crassa between a strain of mating type A and genotype x

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A cross was performed in Neurospora crassa between a strain of mating type A and genotype x+m+z and a strain of mating type a and genotype x m z+. Genes x, m, and z are closely linked and are present in the order x€“m€“z on the chromosome. An ascus produced from this cross contained two copies (€œidentical twins€) of each of the four products of meiosis. If the genotypes of the four products of meiosis showed that gene conversion had occurred at the m locus and that reciprocal recombination had occurred at the x and z loci, what might the genotypes of the four products look like? In the parentheses below, write the genotypes of the four haploid products of meiosis in an ascus showing gene conversion at the m locus and reciprocal recombination of the flanking markers (at the x and z loci).

Ascus Spore Pairs 3-4 5-6 7-8 1-2

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Principles of Genetics

ISBN: 978-1119142287

7th edition

Authors: D. Peter Snustad, Michael J. Simmons

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