Question

Down Syndrome could result from which of the following? Check all that apply.

a) Nondisjunction during meiosis I
b) Nondisjunction during meiosis II
c) Translocation
d) Deletion

Answer 1

Down Syndrome can result from nondisjunction during meiosis I, nondisjunction during meiosis II, and translocation.

Step-by-step explanation:

Down Syndrome, a genetic condition, can result from nondisjunction during meiosis I and nondisjunction during meiosis II. Nondisjunction occurs when homologous chromosomes fail to separate during meiosis, leading to the production of aneuploid gametes. The presence of an extra copy of chromosome 21, known as trisomy 21, causes Down Syndrome.

In addition to nondisjunction, translocation can also result in Down Syndrome. Translocation is the movement of genetic material between non-homologous chromosomes, leading to physical and mental abnormalities.

Therefore, the correct options for the question are a) Nondisjunction during meiosis I, b) Nondisjunction during meiosis II, and c) Translocation.