question_answer

When a diploid female plant is crossed with a tetraploid male, what will be the pIoidy of endosperm cells in resulting seed?

A) Tetraploidy           

B) Hexaploidy

C) Triploidy                 

D) Pentaploidy

Correct Answer: A

Solution :

Secondary nucleus of female would have '2n' chromosome that would be fertilised by male gametes which in this case would be '2/7' because, it is formed from tetraploid male. Therefore endosperm would be 2n + 2n = -4/7