Chapter 5, Problem 49P

A diploid strain of yeast has a wild-type phenotype but the following genotype:

 

a, b, c, d, and e all represent recessive alleles that yield a visible phenotype, and leth represents a recessive lethal mutation. All genes are on the same chromosome, and a is very tightly linked to the centromere (indicated by a small circle). Which of the following phenotypes could be found in sectors resulting from mitotic recombination in this cell? (1) a; (2) b; (3) c; (4) d; (5) e; (6) b e; (7) c d; (8) c d e; (9) d e; (10) a b. Assume that double mitotic crossovers are too rare to be observed.