Assume that evolution is not occurring in a population of 100 cane toads on an i

Question

Assume that evolution is not occurring in a population of 100 cane toads on an island because the population is in Hardy-Weinberg equilibrium. Twenty-five of these toads have no poison glands, a trait found only in those who have a homozygous recessive genotype. How many individuals in the population are heterozygous for the allele that determines the presence of poison glands?



A. 0.25


B. 0.50


C. 25


D. 50


E. 75

I am having some problems understanding the H-W equilibrium.


In a population of 500 Sumatran tigers, 250 individuals have broad stripes (BB), 150 have thin stripes (Bb) and 100 have no stripes (bb). What is the frequency of the dominant allele in this population?

I answered E for this one....is that right?

A. 0.25


B. 0.35


C. 0.40


D. 0.50


E. 0.65

Explanation / Answer

1.50 individuals 2. your answer is correct By using gene count method = BB + ½ of heterozygotes BB--------250/500 Bb-------150/500 bb---------100/500 = .5+ .15= 0.65----------answer

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