During crossing over, exchange of segments takes place between:
Correct answer: B. Non-sister chromatids of homologous chromosomes
- A. Sister chromatids of homologous chromosomes
- B. Non-sister chromatids of homologous chromosomes
- C. Non-sister chromatids of non-homologous chromosomes
- D. Sister chromatids of non-homologous chromosome
Explanation
B is correct. As the homologous chromosomes line up during meiosis, an exchange of segments between non-sister chromatids occurs.
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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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