Wize Grade 12 Biology Textbook > Populations Size and Gene Pools

Hardy-Weinberg Principle

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Extra Practice

Consider a village population that is in HWE. Suppose that 36% of the people cannot smell asparagus in urine, which is a recessive trait. What percentage of the population must be homozygous for the ability to smell asparagus?

In a population of fruit flies, the R allele confers regular black eye colour while the r allele produces red eye colours. Individuals that are heterozygous have pink eyes. In a population of 150 flies, 15 have red eyes, 90 have normal black eyes and 45 have pink eyes.
a)What type of dominance do these alleles show?
b) Is this population in Hardy-Weinberg equilibrium?

In a population of fruit flies, the R allele confers regular black eye colour while the r allele produces red eye colours. Individuals that are heterozygous have pink eyes. In a population of 150 flies, 15 have red eyes, 90 have normal black eyes and 45 have pink eyes.
a) What type of dominance do these alleles show?
b) Is this population in Hardy-Weinberg equilibrium?