If Crossing-Over Does Not Occur and Homologous Chromosome Pairs Are

question 1

Multiple Choice

If crossing-over does not occur and homologous chromosome pairs are not independently assorted during meiosis I,resulting in all maternal chromosomes sorted to one cell while all paternal chromosomes are sorted to another cell,what would be the genetic results in the gametes produced at the end of meiosis II?

• A) Twenty-five percent of the gametes would contain only maternal DNA and 75% of the gametes would contain only paternal DNA.
• B) Seventy-five percent of the gametes would contain only maternal DNA and 25% of the gametes would contain only paternal DNA.
• C) Fifty percent of the gametes would contain only maternal DNA and 50% of the gametes would contain only paternal DNA.
• D) All gametes would contain equal amounts of maternal and paternal DNA.

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