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What percentages can be expected in the offspring of cross between a female carrier for color blindness and a male with normal color vision?
A. 75% normal males, 25% carrier females.
B. 50% colorblind males, 50% colorblind females.
C. 25% normal male, 25% colorblind males, 25% normal females, 25% carrier females.
D. 25% normal males, 25% colorblind males, 25% carrier females, 25% colorblind females.
A female carrier has one normal X chromosome and one defective X chromosome with respect to color blindness and a normal male has a normal X and a Y chromosome. A Punnett square reveals that 1 is the only choice.
 
 
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Yes, that is my dog and she can fly
 
 
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Taken: 40 times
Added: 6/29/2008
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While these questions do not fit the MCAT format (they have no related reading passages) they cover concepts one should understand in order to do well in the biological sciences portion of the MCAT.
 
 
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