Question

In an angiosperm a female plant having $2n=24$ is crossed with a male plant having $2n=12$. What will be the chromosome number of the endosperm?

• A. 12
• B. 18
• C. 24
• D. 30

Answer 1

Answer: (D)

30

The female angiosperm plant with 2n = 24 forms haploid egg cells with n=12 and diploid central cell with 2n= 24. Likewise, the male angiosperm plant with 2n=12 forms haploid male gametes with n=6. Fusion of haploid male gamete (n=6) with diploid central cell (2n=24) will form the endosperm with 3n= 30. So, the correct answer is option D.