Question

additional details were added for this assignment.

the student had a 50 percent chance of inheriting brown or blue eyes.
in order to have brown eyes, the student would need to inherit the alleles for brown eyes from both parents.
in order to have blue eyes, the student would have to inherit the alleles for blue eyes from both parents.
the allele for brown eyes is dominant to the allele for blue eyes.
the student had a 75 percent chance of inheriting blue eyes.

b 👁️ b

Explanation:

1. Analyze each option:

• Option 1: The student's genotype is "bb" (homozygous recessive for blue eyes). If we assume a typical cross (e.g., if parents were Bb and Bb, but here the student is bb), the idea that to have brown eyes one needs alleles from both parents is incorrect because brown is dominant (B), so having one B (from one parent) and one b (from the other) would give brown eyes. Also, the student here has bb, so this option is wrong.
• Option 2: The student has "bb" genotype. Blue eyes are a recessive trait, so to have blue eyes, one needs two recessive alleles (bb), which means inheriting the allele for blue eyes from both parents (since each parent contributes one allele). This is correct.
• Option 3: The student has "bb" (blue eyes). If brown were dominant (B), then a person with Bb or BB would have brown eyes. But the student's genotype is bb, so this statement about brown being dominant is not directly supported by the student's genotype alone in terms of the student's inheritance chance as per the question's context (the student's own inheritance for their eyes). Also, the student's genotype is bb, so the idea that brown is dominant is a general fact, but the question is about the student's inheritance chance. However, the student's own genotype is bb, so the chance for the student to have blue eyes is 100% (since they have bb), so the option about 50% or 75% is wrong. But the option "In order to have blue eyes, the student would have to inherit the alleles for blue eyes from both parents" is correct because blue is recessive (assuming standard eye color genetics where blue is recessive to brown). So for a person to have blue eyes, they need two recessive alleles (bb), which means inheriting b from both parents.
• Option 4: The student's genotype is bb, so the chance of inheriting blue eyes is 100% (since they have bb), not 75%, so this is wrong.
• Option 5: The student's genotype is bb, so the chance of inheriting brown eyes is 0% (since they have bb), not 50%, so this is wrong.

Answer:

The correct option is: In order to have blue eyes, the student would have to inherit the alleles for blue eyes from both parents.