GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AA
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Aa
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aA
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aa
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Detailed explanation-1: -In man, the blue eye colour is recessive to the brown eye colour.
Detailed explanation-2: -2: Simple four-generation Mendelian Pedigree of Brown and Blue eyes. Phenotype shown as brown or blue while dominant brown gene = B and recessive blue gene = b Individuals with bb have blue eyes, while individuals with BB or Bb have brown eyes.
Detailed explanation-3: -The Single Gene Trait There is one genetic variation, a human trait that has a single gene governing it, and that is eye color which is blue or brown. Brown eyes are dominant and blue eyes recessive.
Detailed explanation-4: -The presence of heterozygous alleles for eye color will result in the development of a brown color phenotype only. Thus for blue color phenotype to be generated, the alleles must be homozygous recessive.
Detailed explanation-5: -The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.