Question

Identify the chromosome number of the endosperm in the following case. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12.

Options

• 10

• 20

• 24

• 30

Answer 1

30

Explanation:

The haploid male gamete and the diploid secondary nucleus fuse three times to generate endosperm. As a result, when a diploid secondary nucleus (2n = 24) is present,

triploid fuses with haploid male gamete (n = 6), haploid fuses with haploid male gamete

The formation of endosperm (3n = 30).