Question

A pollen grain from tetraploid plant fuses with a diploid plant, resulting seed will have

• A. 2 $n$ endosperm
• B. 3 $n$ endosperm
• C. 5 $n$ endosperm
• D. 4 $n$ endosperm

Answer 1

Answer: (D)

4 $n$ endosperm

D. 4n endosperm

Reason: The tetraploid (4n) plant contribute 2n male gamete and diploid plant (female plant) contributes two haploid polars to form a secondary nucleus of 2n nature which finally develops into primary endosperm through triple fusion using diploid male gamete. Thus the ploidy level of endosperm will be 4n.