Favism is a disease in which a person cannot tolerate a certain type of bean. It is caused by an X-linked, recessive gene. If Joe has it, which statement would be true?
A) All his sons will have it.
B) His daughters will carry it.
C) Joe's father had it.
D) Half of Joe's sons will have it.

Question

Quizplus · Accepted Answer

Since favism is caused by an X-linked, recessive gene, Joe's sons will only have a 50% chance of inheriting the gene and being affected. However, Joe's daughters will carry the gene and have a 50% chance of passing it on to their own children. It is not specified whether Joe's father had it or not, therefore, we cannot assume either way.

Favism Is a Disease in Which a Person Cannot Tolerate