First slide

Double Fertilisation

Question

The pollen grain of an angiosperm has 26 chromosomes. Calculate the number of chromosomes present in the zygote and endosperm of the plant.

Easy

A

52 and 78 respectively.
B

26 and 78 respectively.
C

26 and 52 respectively.
D

78 and 52 respectively.

Solution

The pollen grain of an angiosperm is haploid. The zygote is diploid and the endosperm is triploid.
Therefore, n= 26
Zygote (2n)= 26 x 2 = 52
Endosperm (3n) = 26 x 3= 78.

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