Multiple choice

When tetraploid female plant is crossed with diploid male plant, the ploidy of the endosperm is

  1. triploid

  2. diploid

  3. tetraploid

  4. pentaploid

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The female parent is tetraploid (4n), so the polar nuclei are 2n each. The male parent is diploid (2n), so the male gamete is n. Fusion of 2n + 2n + n results in a 5n (pentaploid) endosperm.

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