Question

Which of the following is an example of an X-linked recessive disorder?

A. Sickle cell disease
B. Methemoglobinemia
C. Color blindness
D. Huntington disease

Answer 1

an example of an X-Linked recessive disorder is colorblindness.

Answer 2

The answer is C: Color blindness

Step-by-step explanation:

The pattern of inheritance in case of color blindness is X-linked recessive. It means the gene responsible for color blindness is present on X-chromosome. As we know that male has only one copy of X whereas females have two copies of X, so their expressions vary in males and females. In case of X-linked recessive genes, two recessive copies must be present in females for their expression whereas in males a single recessive copy of recessive gene is sufficient to show the expression. If a women is heterozygous for color blindness gene then she will act as a carrier.