The defective gene on the X chromosome will normally be transmitted to the male offspring only by the mother.
What is X-linked recessive inheritance?
A genetic trait or condition resulting due to a mutation on the X-chromosome can be inherited from the parent to the child. In X-linked recessive inheritance, a daughter gets a single mutated gene on the X-chromosome from one of her parents.
The X-chromosome she gets from the other parent will generally cancel the influence of the mutation, and she most probably will not possess the genetic condition. However, if she gets a mutated copy of the gene from both the parents, she will get influenced with the condition.
A father cannot pass on the X-linked recessive conditions to their sons. In case, when a son gets a mutated gene on the X-chromosome from his mother, the genetic condition is more probably going to take place. The X-linked recessive conditions most generally takes place in males.
Thus, the correct answer is option A, that is, the mother.
Find out more information about X-linked recessive inheritance here:
https://brainly.com/question/4322018
