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Mitotic Phase

In a hypothet...

Question

In a hypothetical crossing, an angiospermic male plant has 2x chromosomes and the female plant has 4x chromosomes. Its endosperm will have ______ chromosomes.

A

4x

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B

5x

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C

x

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D

3x

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Solution

The correct option is B 5x
Female plant $\to$ 4x
Central cell $\to$ 2x + 2x (Fusion of polar bodies)

Male plant $\to$ 2x
Male gamete $\to$ 1x (haploid)

Endosperm = Central cell + Male gametes
= 2x + 2x + 1x
= 5x
Hence, the endosperm will have 5x chromosomes.

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