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Using the Punnet square, if the male is xY and the female is XX, where x = recessive and X = dominant, then males get the disease since they only have 1 x chromosome. Females can be carriers, Xx, or have the disease..xx, or not at all XX..

so X X (female none carrier)

x Xx Xx

Y XY XY

(male carrier)

Leaves you with 100 percent chance of daughters being carriers, and 100 Percent chance for sons being healthy none carriers....

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14y ago
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7y ago

Their offspring would have a 50% chance of being Xr like their parents and 25% chance of being XX and 25% chance of being rr. 0% chance of having color vision since neither parent has a R.

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Q: Red-green colorblindness is an X-linked trait. Color vision (XR) is dominant to red-green colorblindness (Xr). Cynthia has red-green colorblindness and so does her husband Tom. What is the probability?
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