A haemophilic male marries a haemophilia B carrier female have 4 children. 1 of their children is haemophilic and the remaining 3 are normal. What is the probability that their next child will be haemophilic?
Correct answer: B. 50%
- A. 25%
- B. 50%
- C. 75%
- D. 100%
Explanation
If a haemophilic male marries a carrier female, there is a 50% chance that their next child will be haemophilic.
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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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