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.

Question

Quizplus · Accepted Answer

Many chromosome abnormalities are lethal and cause spontaneous abortion of the embryo early in development. Natural selection then acts against these abnormalities, preventing them from becoming more common in the population.

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