A farmer bought a herd of 500 sheep, taken from a freely breeding population, and later found that 25 of the animals had an economically undesirable feature, crinkly-hair, caused by the recessive allele (c). Assume Hardy-Weinberg Equilibrium.  The owner then separates all those animals showing crinkly-hair and sends them for slaughter. He allows the remaining animals to breed freely. What proportion of the next generation of lambs would be expected to show crinkly hair?

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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A farmer bought a herd of 500 sheep, taken from a freely breeding population, and later found that 25 of the animals had an economically undesirable feature, crinkly-hair, caused by the recessive allele (c). Assume Hardy-Weinberg Equilibrium. 

The owner then separates all those animals showing crinkly-hair and sends them for slaughter. He allows the remaining animals to breed freely. What proportion of the next generation of lambs would be expected to show crinkly hair?

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Hardy Weinberg equilibrium states that the alleles and genotype frequencies in population will remain constant from one generation to generation in absence of any evolutionary influences. Influences would be genetic drift , selection, 

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