In pea plants, the allele for wrinkled seeds (r) is recessive to the allele for round seeds (R). A population that is in Hardy-Weinberg equilibrium has an allele frequency of r = 0.4. If there are 250 offspring in the next generation, which of the following would be expected?
40 plants with wrinkled seeds and 210 plants with round seeds
62 plants with wrinkled seeds and 188 plants with round seeds
90 plants with wrinkled seeds and 160 plants with round seeds
100 plants with wrinkled seeds and 150 plants with round seeds

Question

In pea plants, the allele for wrinkled seeds (r) is recessive to the allele for round seeds (R). A population that is in Hardy-Weinberg equilibrium has an allele frequency of r = 0.4. If there are 250 offspring in the next generation, which of the following would be expected?
40 plants with wrinkled seeds and 210 plants with round seeds
62 plants with wrinkled seeds and 188 plants with round seeds
90 plants with wrinkled seeds and 160 plants with round seeds
100 plants with wrinkled seeds and 150 plants with round seeds

ramirocruzo · Answer

In Hardy-Weinberg equilibrium, gene frequency doesn't change in population so, 0.4 will be the frequency of r seeds in off springs i.e. $$250\times0.4=100$$ wrinkled ones