In meiosis crossing over is the phenomenon of exchange of segments between non-sister chromatids of homologous chromosomes during:
Correct answer: A. Prophase I
- A. Prophase I
- B. Prophase II
- C. Anaphase I
- D. Anaphase II
Explanation
Exchange of segments between non sister chromatids of homologous chromosomes is called crossing over. It occurs during pachytene stage of prophase I in meiosis.
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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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