The condition called trisomy results from a(n):
A) mistake in mitosis called nondisjunction.
B) mistake in meiosis called nondisjunction.
C) abnormality in a single gene.
D) genetic predisposition.

Question

Quizplus · Accepted Answer

Trisomy occurs due to the mistake in the cell division process called meiosis, specifically nondisjunction, which results in the production of a gamete with an extra chromosome. This extra chromosome is then passed onto the offspring, resulting in the condition of trisomy. Mistakes in mitosis do not result in trisomy but instead result in conditions like mosaicism. Abnormality in a single gene can cause genetic disorders, but trisomy is not caused by a single gene but by an extra chromosome. Genetic predisposition refers to having a higher likelihood of developing a particular condition due to inherited genes, but it is not directly related to the occurrence of trisomy.

The Condition Called Trisomy Results from A(n)