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Anaphase I

Genetic cross...

Question

Genetic crossing over usually takes place during

A

Meiosis I

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B

Mitosis

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C

Meiosis II

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D

Mitosis and Meiosis

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Solution

The correct option is C Meiosis I
Chromosomal crossover is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes. It is one of the final phases of genetic recombination, which occurs during prophase I of meiosis (pachytene) during a process called as synapsis.

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Q. Assertion: Mitosis is known as equational division and meiosis is known as reduction division.
Reason: During meiosis, the non-sister chromatids of homologous chromosomes cross-over and exchange genetic information. This step does not occur during mitosis.

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Q. Pick out the correct statements.
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(B) During mitosis, the DNA replicates once for one cell division and in meiosis, the DNA replicates twice for two cell divisions.
(C) Mitosis and meiosis occur both in sexually reproducing organisms.

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1. Mitosis is a type of cell Division takes place in_____ cell
2. Meiosis is a type of cell Division takes place in_______ cell
3. In mitosis the chromosome number_____
4. In meiosis the chromosome number_____
5. Mitosis occurs at the time of_________reproduction
6. Meiosis occurs at the time of _________ reproduction

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