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nevsk [136]
1 year ago
5

What proportion of the population is probably heterozygous (Aa) for this trait?

Biology
1 answer:
bogdanovich [222]1 year ago
3 0

The correct option is 3). 0.5. Since recessive homozygous are 25% of the total individuals, we could assume that their parents genotype was heterozygous. Only a double heterozygous cross (that is Aa -male- <> Aa -female) could produce the observed (25%) homozygous proportion. Following this assumption, the heterozygous proportion will be 50%.

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Since albinism is an autosomal recessive trait, the genotype of albino people would be homozygous recessive. Therefore, the frequency of homozygous recessive genotype in the population (q2) = 250/1000= 0.25.

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