Biology
Grade-10
Easy
Question
In the United States, one in every 10,000 new-borns is born with phenylketonuria (PKU), a metabolic condition caused by a recessive gene. What percentage of the human population is likely to carry the PKU allele?
- Approximately 0.2
- Approximately 0.02
- Approximately 0.19
- Approximately 0.98
Hint:
Approximately 0.02
The correct answer is: Approximately 0.02
This is by Hardy-Weinberg principle.
=
dominant homozygous frequency (AA)
=
heterozygous frequency (Aa)
=
recessive homozygous frequency (aa)
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