OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the heterozygous genotype for having brown eyes?(Remember:Brown (B) is dominant over blue (b).)
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BB
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Bb
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bb
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None of the above
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Explanation:
Detailed explanation-1: -Brown eye colour is dominant over blue eye colour. Therefore, for the brown-eyed parents having blue-eyed child, the possibility is that both have heterozygous genotype i.e. Bb.
Detailed explanation-2: -The heterozygous parent must have two different genes, and at least one for the dominant brown eyes (B). These parents must have the genotypes of (bb) and (Bb). There is a 50% chance of an offspring having a (Bb) genotype, and thus brown eyes.
Detailed explanation-3: -Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes.
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