Question

When a diploid female plant is crossed with a tetraploid male,the ploidy of endosperm cells in the resulting seed is?

Answer 1

5n

Explanation:

The male makes 2n gametes. The female makes 1n gametes. Two male sperm cells and one central cell from the female are combined in the formation of the endosperm.
2n + 2n + 1n gives 5n for the endosperm