Question

which condition occurs as a result of nondisjunction?
a down syndrome
b turner syndrome
c poly - x syndrome
d all apply.

Explanation:

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division. Down syndrome (trisomy 21) often occurs due to nondisjunction during meiosis. Turner syndrome (XO) is caused by nondisjunction leading to the loss of an X - chromosome. Poly - X syndrome (XXX, XXXX, etc.) also results from nondisjunction of X - chromosomes during meiosis. So all these conditions can occur as a result of nondisjunction.

Answer:

D. All apply.