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Questions and Answers
What can alter the phenotype of an organism according to the text?
What can alter the phenotype of an organism according to the text?
- Changing genes only
- Changes in protein structure
- Altering punctuation marks (correct)
- Mutations in coding regions
When did the mutation giving rise to blue eye color likely occur?
When did the mutation giving rise to blue eye color likely occur?
- 25,000-30,000 years ago
- 6,000-10,000 years ago (correct)
- 15,000-20,000 years ago
- 1,000-5,000 years ago
What determines eye color according to the text?
What determines eye color according to the text?
- Presence of pigments in the irises
- Thickness of melanin in the ABL
- Amount of melanin, thickness, density of iris, and collagen fibers (correct)
- Level of collagen fibers in the iris
What is the function of OCA2 gene mentioned in the text?
What is the function of OCA2 gene mentioned in the text?
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What does HERC2 encode for?
What does HERC2 encode for?
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Where was a single nucleotide change found in people with blue or brown eyes as per the text?
Where was a single nucleotide change found in people with blue or brown eyes as per the text?
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What role does melanin play in determining eye color?
What role does melanin play in determining eye color?
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What aspect is responsible for brown eyes having high levels of melanin?
What aspect is responsible for brown eyes having high levels of melanin?
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What can small changes in a DNA sequence lead to according to the text?
What can small changes in a DNA sequence lead to according to the text?
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What is an example of an alteration that can affect an organism's phenotype according to the text?
What is an example of an alteration that can affect an organism's phenotype according to the text?
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