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Q.

Assume that a diploid plant has 24 chromosomes. This plant undergoes autogamy. Calculate the number of chromosomes present in the nucellus and the endosperm.

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a

Nucellus- 24 chromosomes, Endosperm- 36 Chromosomes.

b

Nucellus- 12 chromosomes, Endosperm- 24 chromosomes.

c

Nucellus- 24 chromosomes, Endosperm- 24 chromosomes.

d

Nucellus- 12 chromosomes, Endosperm- 36 chromosomes.

answer is A.

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Detailed Solution

The diploid plant has 24 chromosomes. The nucellus is also a diploid structure and it will also have 24 chromosomes. The endosperm is formed by the fusion of the diploid secondary nucleus with the male gamete. Therefore, the endosperm will have (24+12)=36 chromosomes.
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