Suppose a haploid yeast strain carrying two recessive linked markers his4 and leu2 was crossed with a strain that was wild type for HIS4 and LEU2 but had an inversion of this region of the chromosome as shown here in blue: Several different kinds of crossovers between nonsister chromatids could occur during meiosis in the resulting diploid. For each of the following events, state the genotype and phenotype of the resulting four haploid spores. a single crossover between the markers HIS4 and LEU2 a double crossover involving the same chromatids each time, where both crossovers occur between the markers HIS4 and LEU2 a single crossover between the centromere and the beginning of the inverted region
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in this one we have the example of a single cross our between the markers of the H. i. s. four And the aisle e. U. two for part B. We need to have a double crossover that involved in the same committee decides where both crossovers occur between the markers of the H. I. S. For Ndld us led you to so basically we have part B. We have a line. So this is the L. U. Four and also led you to and this is a normal chromosome and this is viable. The 2nd 1 that we will have. Yes we have still a line. So we have L. U. Four and we have led you to and this is the centric. So we have this centric or not viable. Next one We have The L. e. U. two And we have the h. i. s. four and this is inverted and this is viable. And lastly We have the l. e. U. two And h. i. s. four which is eccentric, so this is eccentric. So we have a centric and this is not viable.