In humans, color blindness is inherited as a recessive trait linked to the x = chromosome. the parents have normal vision

In humans, color blindness is inherited as a recessive trait linked to the x = chromosome. the parents have normal vision, and the son is color blind, can color blind girls be born in this family

Let’s designate a chromosome containing in its gene such a color discrimination pathology as color blindness as Xd. Then the chromosome that determines the development of normal color discrimination will be XD.

A boy born with color blindness is XdY, while, as you know, he inherits Y from a healthy father, who will be written as XDY and produce sperm XD and Y.

Consequently, the boy inherited the pathological gene from his mother, who, according to the condition of the problem, is healthy. In this case, she is the carrier of the gene that causes color blindness – XDXd and produces eggs XD and Xd.

Possible options for the offspring of this married couple:

healthy girls XDXd – 50%;

boys – color blind XdY – 50%.

Answer: girls suffering from color blindness cannot appear in such a family.