A yeast strain with a mutant spo11 - allele (the mutant allele is nonfunctional; it makes no Spoil protein) has been isolated. What do you suppose is the phenotype of this mutant strain?

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Frank

Biology

12 September, 20:40

A yeast strain with a mutant spo11 - allele (the mutant allele is nonfunctional; it makes no Spoil protein) has been isolated. What do you suppose is the phenotype of this mutant strain?

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Tiara Blackburn · Answer 1

The protein Spo11 performs an essential function in starting the process of recombination. If yeast exhibits a mutation on spo11 - allele, it turns non-functional and it cannot generate the protein spo11 anymore. As a consequence, it cannot go through any recombination process, and the spores generated from it would be inviable because of aneuploidy. Aneuploidy refers to a condition in which the cell comprises an unusual number of chromosomes.