Question

An angiosperm 'A' and a gymnosperm 'G' have $100$ chromosomes in the cells of their meristem. What would be the correct number of chromosomes in the endosperms of the seeds of A and G?

• A. A$=300$; G$=300$
• B. A$=200$; G$=200$
• C. A$=100$; G$=300$
• D. A$=300$; G$=100$

Answer 1

The correct option is D A$=300$; G$=100$

If the 2n number is 8 then the endosperm must have 12 chromosomes because it is triploid (3n). Each haploid nucleus ( such as a polar nucleus) inside the embryo sac must also have 4 chromosomes.

So, the correct option is 'A = 300; G = 100'.