In humans, the recessive genes for color blindness and night blindness (“night blindness”) are linked to the X chromosome and are located

In humans, the recessive genes for color blindness and night blindness (“night blindness”) are linked to the X chromosome and are located at a distance of 40 morganids from each other. What is the probability of the birth of children with two anomalies from the marriage of a woman with normal vision, whose mother suffered from “night blindness” and whose father was color blind, with a man normal in both signs (provided that the genes for color blindness and night blindness are in the cis position, and when gametes are formed, crossing over occurs)?

The probability of having children with two anomalies from the marriage of a woman with normal vision, whose mother suffered from “night blindness” and whose father was color blind, with a normal man on both grounds is 15%.

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