Three haploid yeast petite mutants were isolated, one from each of the three cla

Question

Three haploid yeast petite mutants were isolated, one from each of the three classes of petite mutations -- suppressive petites, neutral petites, and segregational petites. You perform the crosses shown in this table. Use the results of the crosses to classify each of the petite mutants. Fill in the lettered blanks using the number of the terms listed: 1) neutral; 2) segregational; and 3) suppressive. For example if you think Petite #1 is a neutral petite, enter a 1 in the blank provided for a. a. Petite #1 is a _____ petite mutant. b. Petite #2 is a _____ petite mutant. c. Petite #3 is a _____ petite mutant.

Explanation / Answer

petite mutation in yeast is found due to the mutation in the mitochondrial gene or nuclear gene. Petite mutant due to nuclear gene follows the mendelian pattern of inheritance. Segregational petite comes under nuclear mutation and in neutral and suppressive petite mutation is due to deletion in mitochondrial DNA.

answer a. Segregational petite

b supervise petite

c. Neutral petite

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