What is the probability of a hemophilic daughter of a normal man whose father was hemophilic and a carrier woman?
Correct answer: B. 50%
- A. 0%
- B. 50%
- C. 25%
- D. 75%
Explanation
Out of 4 children 1 son and 1 daughter would be haemophilic, 1 daughter can be a carrier and 1 son completely normal. So 2 out of 4 children are haemophilic. Hence the probability is 50%.
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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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