Which of the following statements is true about sex-linked inheritance?

Question

Select TWO correct answers.

Two copies of the gene are needed to cause the disease to affect the individual.

Only one copy of the gene is needed to cause the disease to affect the individual.

The disorder is carried on the "Y" chromosome.

The disorder is carried on the "X" chromosome.

The disorder is recessive and carried only by females.

Answer 1

The two correct answers about sex-linked inheritance are:

1. Only one copy of the gene is needed to cause the disease to affect the individual. (This is true for disorders linked to the X chromosome in males, as they have only one X chromosome.)

2. The disorder is carried on the "X" chromosome. (Many sex-linked disorders, such as hemophilia and color blindness, are indeed linked to genes on the X chromosome.)

The other statements are not accurate in the context of sex-linked inheritance.