Imagine that the doughnut is a sexually reproducing animal and that a single enz
ID: 204268 • Letter: I
Question
Imagine that the doughnut is a sexually reproducing animal and that a single enzyme forms the hole. All doughnuts observed in the past have had holes. Suppose a mutation occurs in one gene of the doughnut such that it now codes for an inactive protein instead of the hole-forming enzyme. Which of the following predictions would be most likely in descendants of this mutant doughnut? C is the correct answer but why are A, B, D, and E wrong? Explain each. a. All members of the next generation will have holes b. Heterozygous doughnuts will not have holes. c. If the cell in which the mutationloccurs undergoes mitosis, subsequent generations of doughnuts will all have holes. d. The next generation will all be holeless. e. Past generations of doughnuts have all had holes.Explanation / Answer
Genes regarding the hole formation in doughnut are present in two chromosome, since plant is diploid. If mutation occurs in one chromosome, then doghnut plant still have normal hole forming enzyme unless mutation comes in homozygous recessive( hh) condition. So, in next generation will have
Hh being heterozygous would have hole.
HH is hole.
hh donot have hole.