Question

Which of the following is NOT true regarding Hardy-Weinberg equilibrium (HWE)?

Question 1 

Which of the following is NOT true regarding Hardy-Weinberg equilibrium (HWE)? 

Most real species will not be at HWE at all loci within their genome 

If a locus has genotype frequencies consistent with HWE, then the species as a whole is not evolving 

If a locus has genotype frequencies consistent with HWE, then no evolution is occurring at that locus 

If a locus does NOT have genotype frequencies consistent with HWE, then some form of evolution is occurring at that locus 


Question 2 

Which of the following is true? 

If alleles at a locus show incomplete dominance, heterozygotes are intermediate in phenotype compared to the two homozygote genotypes 

If a beneficial allele is dominant, natural selection will cause it to increase in frequency, but at a slower rate than if it were recessive 

If an allele is recessive, it is more likely to be deleterious 

Incomplete dominance means that homozygotes have higher fitness than heterozygotes

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Answer #1

1. Second option: If a locus have genotype frequencies consistent with HWE, then the species as a whole is not evolving.

HWE is a theory where whatever gene or allele frequencies are consistent with HWE does not evolve.

This statement is not true because when a locus has the genotype frequencies consistent with HWE, then that means that particular locus is not evolving and does not mean the whole species is not evolving.

2. First option: If alleles at a locus show incomplete dominance, heterozygotes are intermediate in phenotype compared to the two homozygote genotypes.

Incomplete dominance is a phenomenon where one allele for a specific trait or phenotype is not completely expressed over the allele it is paired to. Here the dominant allele do not completely mask the recessive alleles effects but the resulting intermediate phenotype will be a (heterozygote) blend of both the alleles.

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