science
Grade-10
Easy

Question

In prophase I of meiosis I __________ occurs.

  1. Non-disjunction 

  2. Separation of homologous chromosomes

  3. Separation of sister chromatids

  4. Crossing over

Hint:

The exchange of DNA takes place in prophase

The correct answer is:

Crossing over


    In prophase, I, a complex of DNA and proteins known as chromatin condenses to form chromosomes. Duplicated pairs of chromosomes, known as sister chromatids, remain connected at a central point called the centromere.

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