During meiosis, a pair of chromosomes may fail to separate completely, which is known as a disjunction. The nurse is aware that it may cause which of the following monosomy conditions?
A) Turner syndrome
B) Sickle cell anemia
C) Cystic fibrosis
D) Alzheimer's disease
Ans: A
Feedback: During meiosis, a pair of chromosomes may fail to separate completely, creating a sperm or oocyte that contains either two copies or no copy of a particular chromosome. This sporadic event is called nondisjunction and can lead to either a trisomy or monosomy condition. Down syndrome is a trisomy condition, and Turner syndrome is a monosomy condition.
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