Stage of Meiosis Where Crossing Over Occurs
Crossing over takes place in which stage of meiosis?
- Diplotene stage of Prophase-I
- Pachytene stage of Prophase-I — Correct Answer
- Metaphase of Meiosis-I
- Metaphase of Meiosis-II
Explanation:
Correct Answer: Pachytene stage of Prophase-I
Crossing over occurs in the Pachytene stage of Prophase-I of Meiosis. It is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes.
Key Definitions
- Crossing over: Exchange of segment between non-sister chromatids of homologous chromosomes in Pachytene stage of Meiosis-I.
- Translocation: Exchange of chromosomal segments between non-homologous chromosomes.
- Crossing over is the 2nd biggest cause of genetic variation (after Segregation).
- DNA replication occurs in S-phase of Interphase (not in Prophase).
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
