robin082006
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425. Individuals with achondroplastic dwarfism have about 80% fewer viable offspring than do normal persons, but the incidence of achondroplasia seems to have remained constant for generations. These observations imply
a. Decreased fitness, negative selection, and relatively high mutation rates
b. Increased fitness, negative selection, and relatively high mutation rates
c. Decreased fitness, positive selection, and relatively low mutation rates
d. Increased fitness, positive selection, and relatively low mutation rates
e. Decreased fitness, positive selection, and relatively high mutation rates
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| mamc
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d?
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| ts97
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A, I think. Fitness is definetly decreased, so there must be high mutation rate to support the incidence.
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| r_albayunen
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e?
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| robin082006
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A is the answer
See Kaplan genetics for details.
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| blueocean
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guys, maybe I am stupid but how could be a negative selection here?
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| AngelT
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Negative selection?
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