Polydactyly (being born with more than 5 fingers or toes) is caused by a dominant allele of a single gene. If the frequency of the recessive allele is 0.9 (or 90%) in a certain population, what percentage of the population would you expect to be heterozygotes? Assume this population is in Hardy-Weinberg equilibrium. Note: In reality, there are other causes of polydactyly when it is accompanied by other disorders, so this problem is an over-simplification.   18%         1%         90%         81%

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Polydactyly (being born with more than 5 fingers or toes) is caused by a dominant allele of a single gene. If the frequency of the recessive allele is 0.9 (or 90%) in a certain population, what percentage of the population would you expect to be heterozygotes? Assume this population is in Hardy-Weinberg equilibrium.

Note: In reality, there are other causes of polydactyly when it is accompanied by other disorders, so this problem is an over-simplification.

 
18%
 
 
 
 
1%
 
 
 
 
90%
 
 
 
 
81%
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