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Moderate

Predictions from Phenotypes

APBIO-VL1NWE

John and his father both have color blindness, an X-linked, recessive trait. John has a sister, Kathy, who shares the same parents. Their mother is not colorblind.

Which of the following is the probability of Kathy (or any new daughters) being colorblind?

A

0

B

0.25

C

0.5

D

1