Cell Cycle and Cell Division

Distinguish between Metaphase I and Metaphase of mitosis.

Metaphase I

Metaphase

1. Tetrads are arranged at equator.

2. Two equatorial plates are formed by centromeres.

1.Chromosomes are arranged at centre.

2. One equatorial plate is formed by centromeres.

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Why Meiosis II is necessary when cell is divided in Meiosis I ?

Why does a multi cellular organism require two types of cell division ?

What is chiasmata ? State its significance.

Why is meiosis essential in sexually reproducing organisms ?

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