Many Chromosome Abnormalities (Trisomies and Monosomies) Are Not Observed in the Human

question 107

Multiple Choice

Many chromosome abnormalities (trisomies and monosomies) are not observed in the human population because

• A) they are lethal and cause spontaneous abortion of the embryo early in development.
• B) all trisomies and monosomies are lethal early in childhood.
• C) meiosis distributes chromosomes to daughter cells with great precision.
• D) they are so difficult to count.
• E) the human meiotic spindle is self-correcting.

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