Question

Describe nondisjunction and the effect it can have on a human.

Answer 1

Answer: This is the sample response Edge 2021

It is the failure of homologous chromosomes to separate properly during gamete formation (meiosis).

Klinefelter syndrome can occur and is seen as males with gametes XXY instead of XY.

It affects sex organs, including creating smaller testes and causing sterility.

Males can be taller in stature with normal intelligence.

Step-by-step explanation:

Answer 2

Nondisjunction forms abnormal number of chromosomes in the gametes. Nondisjunction causes human disorders in autosomes from chromosomes 1-22. The examples are Down syndrome or trisomy 21, an extra copy of chromosome 21. People with Down syndrome have 47 chromosome instead.