red-green color blindness is an x-linked recessive disorder.

what is the probability of having red-green color blindness for the cross that is represented by the punnett square?
a) 0 percent
b) 25 percent
c) 50 percent
d) 75 percent

What is the probability of having red-green color blindness for the cross that is represented by the Punnett square?

0 percent

25 percent

50 percent

75 percent

Answer B or 25%

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The correct answer would be b) 25 percent.

In females, X-linked recessive disorder is expressed only when the mutated gene is present in both the X chromosomes whereas in males presence of only one copy of mutated gene is sufficient to cause the disease as they have only one X chromosome.

Now the given cross will results in the production of:

From the test, it is clear that only one son out of 4 offspring carries the disease.

Hence, the probability will come out to be 1/4 = 0.25 or 25 percent.

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