chromosomal mutations can have a variety of effects on individuals. down syndrome is a disorder that causes…

chromosomal mutations can have a variety of effects on individuals. down syndrome is a disorder that causes problems such as mild to moderate mental retardation and slow or stunted development. a common form of this disorder is the result of a genetic mutation that occurs when there is an extra chromosome 21. which type of chromosomal mutation causes this form of down syndrome?\nnon - disjunction\ninversion\ndeletion\ninsertion

chromosomal mutations can have a variety of effects on individuals. down syndrome is a disorder that causes problems such as mild to moderate mental retardation and slow or stunted development. a common form of this disorder is the result of a genetic mutation that occurs when there is an extra chromosome 21. which type of chromosomal mutation causes this form of down syndrome?\nnon - disjunction\ninversion\ndeletion\ninsertion

Answer

Brief Explanations:

Nondisjunction is when chromosomes fail to separate properly during cell - division, leading to an extra chromosome 21 in the case of Down syndrome. Inversion is a rearrangement of chromosome segments, deletion is the loss of a chromosome segment, and insertion is the addition of a segment into a chromosome, none of which cause the extra chromosome 21 in Down syndrome.

Answer:

A. nondisjunction