In humans, the sex of the child is determined by:
Correct answer: B. Father's sperm
- A. Mother's egg
- B. Father's sperm
- C. Both equally
- D. Random chance during zygote formation
Explanation
Egg always carries X, sperm carries either X or Y. Fertilization by X-bearing sperm = girl (XX), by Y-bearing sperm = boy (XY). Thus, father determines sex.
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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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