Male XX and female XY sometime occur due to:
Correct answer: B. Transfer of segments between X and Y chromosomes
- A. Deletion
- B. Transfer of segments between X and Y chromosomes
- C. Aneuploidy
- D. Hormonal imbalance
Explanation
The correct answer is the 'Transfer of segments between X and Y chromosomes.' This rare genetic phenomenon involves the translocation of genetic material between the X and Y chromosomes, leading to atypical chromosomal configurations such as male XX and female XY. This translocation affects sexual development and can have implications for reproductive health. Other options, like deletion, aneuploidy, and hormonal imbalance, influence genetic and physical development in various ways but do not directly cause these specific chromosomal alterations.
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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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