What would be true of the newly formed sex cells in a person possessing a mutation that completely prevents crossover?
A)The new cells would have less genetic variability because crossing over contributes to proper chromosome shape, so parts of the chromosome would be non-functional.
B)The new cells would have less genetic variability because whole chromosomes would only be entirely maternal or paternal.
C)The new cells would have more genetic variability because crossing over limits transmission of maternal and paternal genes.
D)The new cells would contain abnormal chromosome numbers because crossing over ensures proper division.

Question

What would be true of the newly formed sex cells in a person possessing a mutation that completely prevents crossover? 
A)The new cells would have less genetic variability because crossing over contributes to proper chromosome shape, so parts of the chromosome would be non-functional.
B)The new cells would have less genetic variability because whole chromosomes would only be entirely maternal or paternal.
C)The new cells would have more genetic variability because crossing over limits transmission of maternal and paternal genes.
D)The new cells would contain abnormal chromosome numbers because crossing over ensures proper division.

Quizplus · Accepted Answer

Without crossover, the homologous chromosomes would segregate independently during meiosis, resulting in whole chromosomes being entirely maternal or paternal. This would decrease the amount of genetic variability in the newly formed sex cells.

What Would Be True of the Newly Formed Sex Cells