Joke Collection Website - Joke collection - A boy's physical examination found that he was red and green blind, but his parents, a brother and a sister all had normal eyesight.

A boy's physical examination found that he was red and green blind, but his parents, a brother and a sister all had normal eyesight.

Red-green color blindness is a recessive inheritance of X, and the mother is the carrier. Father is normal. Brother is normal, sister may be normal, and may be a carrier.

The pathogenic gene is a,

Parents (these two words are very strange. . . )

Dad xAy mom xax

X

XAxA xaxA (sister is one of them) xay (brother) xAy (that boy)

The mobile phone is too troublesome, so let's watch it live.