science
Grade-10
Easy
Question
When does chromosomal crossover occur?
Interphase
Meiosis II
Mitosis
Meiosis I
Interphase
Meiosis II
Mitosis
Meiosis I
Hint:
In this the number of cells are doubled but the number of chromosomes remain the same.
The correct answer is: Meiosis I
- At meiosis I, the diploid cell chromosomes segregate again, giving rise to four haploid daughter cells. It is this stage of meiosis that creates genetic diversity.
- DNA replication precedes the initiation of meiosis I.
- Crossover is a cellular process that occurs when chromosomes of the same type are joined together during meiosis.
- When two chromosomes (one from the mother and one from the father) meet, parts of the chromosome can be swapped.
- Although the two chromosomes contain the same genes, they may have different gene shapes.
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