Question

The presence of only one X chromosome in each body cell of a human female produces a condition known as Turner syndrome. This condition likely results from the process called

A. polyploidy
B. crossing-over
C. nondisjunction
D. hybridization

Answer 1

C. nondisjunction

Step-by-step explanation:

Turner syndrome likely results from the process called nondisjunction. Nondisjunction refers to the failure of chromosomes to separate correctly during meiosis, the process of cell division that occurs during the production of eggs and sperm. If nondisjunction occurs during the production of eggs, it can result in eggs with an abnormal number of chromosomes. If one of these eggs is fertilized by a sperm with a normal complement of chromosomes, the resulting embryo will have an abnormal number of chromosomes.