question_answer

When a diploid female plant is crossed with atetraploid male, the ploidy of endosperm cellsin the resulting seed is:                                                                                                                                                                               

A) tetraploidy         

B) pentaploidy                       

C)  diploidy                              

D)  triploidy

Correct Answer: A

Solution :

                Secondary nucleus of female would have '2n' chromosome that would be fertilized by male gametes which in this case would be '2n? because it is formed from tetraploid male. Hence, endosperm would be 2n + 2n = 4n.