During a visit to a geneticist's practice a patient with blue eyes asks the nurse to explain eye color, adding that his mother had blue eyes and his father had brown eyes. What should the nurse include in this explanation?
Select all that apply.
1. "You have two identical alleles that are responsible for your eye color."
2. "The alleles that are responsible for your eye color are heterozygous."
3. "Your eye color is the result of an expressed gene."
4. "Alleles are forms of a gene."
5. "Your eye color is just one part of your phenotype."
Correct Answer: 2, 3, 4, 5
This patient has a blue-eyed mother and a brown-eyed father, so the patient has two different forms of the gene responsible for his eye color. The patient's alleles are heterozygous. The patient's blue eyes are the result of an expressed gene. An expressed gene impacts the patient's outward experience. Alleles are versions or forms of a gene. The patient's eye color is part of his phenotype. The phenotype is the patient's entire physical, biochemical, and physiologic makeup and is influenced by genetic and environmental factors.
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