Blue eye colour is recessive to brown eye colour. A brown eyed man whose mother was blue eyed marries a blue-eyed women. The children will be:
Correct answer: A. Both blue eyed and brown eyed 1 : 1
- A. Both blue eyed and brown eyed 1 : 1
- B. All brown eyed
- C. All blue eyed
- D. Blue eyed and brown eyed 3 : 1
Explanation
The correct option is Both blue-eyed and brown-eyed, 1:1. In summary, the correct option is Both blue-eyed and brown-eyed, 1:1, because if the brown-eyed man whose mother was blue-eyed marries a blue-eyed woman, their children can inherit either a blue-eye allele from both parents (blue-eyed) or a blue-eye allele from one parent and a brown-eye allele from the other parent (brown-eyed). The expected ratio is 1:1 for blue-eyed and brown-eyed children.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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