Hardy-Weinberg Model Video Lessons

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Problem: A new kind of orchid is produced that develops only purple or pink flowers. Assume that flower color is controlled by a single-gene locus and that the purple allele (C) is dominant to the pink allele (c). A random sample of 1320 orchids from a large cultivated field yields 1.167 purple flowers and 153 pink flowers. What is the frequency of the pink allele in this field population?A. pink allele frequency = 0.847B. pink allele frequency = 0.12C. pink allele frequency = 0.34D. pink allele frequency = 0.39E. pink allele frequency = 0.153

FREE Expert Solution

The given problem shows that the phenotypic frequency is 0.884 (1167/1320) for the dominant trait and 0.116 (153/1320) for the recessive trait. From the given, we can compute for the allele frequencies only by assuming that the population follows Hardy-Weinberg equilibrium. In a Hardy-Weinberg equilibrium, the frequency of the dominant allele can be represented by p, and the frequency of the recessive allele can be represented by q. For a trait that only has two alleles, p + q = 1. Furthermore, these values can be used to compute for the genotypic frequencies: p2 is for the homozygous dominant, 2pq is for the heterozygotes and q2 for the homozygous recessive.

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Problem Details

A new kind of orchid is produced that develops only purple or pink flowers. Assume that flower color is controlled by a single-gene locus and that the purple allele (C) is dominant to the pink allele (c). A random sample of 1320 orchids from a large cultivated field yields 1.167 purple flowers and 153 pink flowers. What is the frequency of the pink allele in this field population?

A. pink allele frequency = 0.847

B. pink allele frequency = 0.12

C. pink allele frequency = 0.34

D. pink allele frequency = 0.39

E. pink allele frequency = 0.153

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hardy-Weinberg Model concept. You can view video lessons to learn Hardy-Weinberg Model. Or if you need more Hardy-Weinberg Model practice, you can also practice Hardy-Weinberg Model practice problems.

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Based on our data, we think this problem is relevant for Professor Holmes' class at WESLEYAN.