GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -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-2: -Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes.
Detailed explanation-3: -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-4: -For example, when someone has brown eyes, it doesn’t necessarily mean they have homozygous genes. It’s possible for them to have a combination, or “Bb”, having one dominant brown allele and one recessive blue allele. In this case, because brown is dominant over blue, they will have brown eyes.