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Questions and Answers
What is the primary driver of changes in allele frequencies in a population?
What is the primary driver of changes in allele frequencies in a population?
- Differences in fitness (correct)
- Environmental changes
- Mutations
- Genetic drift
What is the outcome of directional selection in a population?
What is the outcome of directional selection in a population?
- No change in genetic variation
- Fixation of the deleterious allele
- Decreased genetic variation (correct)
- Increased genetic variation
What is the condition caused by defective alleles of the PAH gene in individuals who eat a normal diet?
What is the condition caused by defective alleles of the PAH gene in individuals who eat a normal diet?
- Sickle cell anemia
- Phenylketonuria (PKU) (correct)
- Trisomy 21
- Cystic fibrosis
What is the role of the environment in determining fitness?
What is the role of the environment in determining fitness?
What is the result of removing phenylalanine from the diet of individuals with defective alleles of the PAH gene?
What is the result of removing phenylalanine from the diet of individuals with defective alleles of the PAH gene?
What is the outcome of genetic drift in a population?
What is the outcome of genetic drift in a population?
What is the term for the process by which one allele becomes more frequent in a population due to natural selection?
What is the term for the process by which one allele becomes more frequent in a population due to natural selection?
What is the resource that provides information about trisomy 21 and other inherited diseases and conditions in humans?
What is the resource that provides information about trisomy 21 and other inherited diseases and conditions in humans?
What is the result of the substitution of an advantageous allele for a deleterious one in a population?
What is the result of the substitution of an advantageous allele for a deleterious one in a population?
What is the term for the process by which populations become reproductively isolated and evolve into distinct species?
What is the term for the process by which populations become reproductively isolated and evolve into distinct species?
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