Question

CAN SOMEONE HELP PLEASE?

4. Which of the following statements regarding human genetic disorders is accurate?
A. Disorders in individual genes are responsible for Down's syndrome.
B. Nondisjunction is responsible for causing Huntington's disease.
C. Disorders in individual genes can cause disease or provide individuals with a genetic advantage.
D. Nondisjunction can lead to an incorrect number of sex chromosomes.

Answer 1

The correct answer is letter A, disorders in individual genes are responsible for Down's syndrome.

This is a human genetic disorder that is associated with physical growth delays, characteristic facial features, and a mild to moderate intellectual disability. This is a condition in which the genes make a copy of the chromosome 21.