Question

1. the sickle cell version of the gene that causes sickle cell disease is recessive. suppose that two parents with no symptoms have a child with sickle cell disease. what genes did the child inherit from the parents? a. the child must have inherited the sickle cell gene from their mother and the normal gene from their father. b. the child must have inherited the normal gene from their mother and the sickle cell gene from their father c. the child must have inherited sickle cell genes from both parents. d. the child must have inherited normal genes from both parents.

Explanation:

Sickle cell disease is recessive, so to express the disease, a child needs two recessive (sickle cell) genes (one from each parent). Parents with no symptoms are carriers (have one normal and one sickle cell gene). So the child must inherit the sickle cell gene from both parents.

Answer:

C. The child must have inherited sickle cell genes from both parents.