Question

Conditions caused by abnormal chromosomal copy number?

1) Are called genetic diseases
2) Are caused by teratogens
3) Are familial
4) Usually affect more than one organ

Answer 1

Conditions caused by abnormal chromosomal copy number are known as chromosomal disorders. They are caused by nondisjunction during meiosis. Examples include Down syndrome and Turner syndrome.

Step-by-step explanation:

Conditions caused by abnormal chromosomal copy number are known as chromosomal disorders. They are caused by nondisjunction, which occurs when homologous chromosome pairs or sister chromatids fail to separate during meiosis. Examples of chromosomal disorders include Down syndrome, which is caused by having three copies of chromosome 21, and Turner syndrome, which is caused by the absence of one X chromosome in females.