For many generations,the following genotypic frequencies were observed in a large population of dinosaurs: 4 % AA,32% Aa,and 64% aa.The climate changed abruptly and resulted in the death of all homozygous recessive dinosaurs (s = 1).In the next generation,the recessive homozygotes died shortly after birth.What percentage of these newborn dinosaurs died?

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The frequency of the recessive allele (a) is sqrt(0.64) = 0.8. The frequency of the dominant allele (A) is 1 - 0.8 = 0.2. The frequency of the heterozygous genotype (Aa) is 2 * 0.8 * 0.2 = 0.32. The frequency of the homozygous recessive genotype (aa) is 0.64. The percentage of newborn dinosaurs that died is the frequency of the homozygous recessive genotype, which is 0.64 * 100 = 64%.

For Many Generations,the Following Genotypic Frequencies Were Observed in a Large