There are 20 chromosomes in the somatic cells of maize. What will be the chromosome number in its

1.nucellar cells

​2.antipodal cell

3.endosperm cells 

4.egg cell

Dear student,
There are 20 chromosomes in the somatic cell of maize which means the ploidy level of somatic cell is 2n = 20 chromosome.
Nucellar cell is diploidic i.e 2n, so chromosome number will be 20.
Antipodal cell is haploidic i.e. n, so chromosome number will be 10.
Endosperm cell is triploidic i.e. 3n, so chromosome number will be 30.
Egg cell is haploidic i.e. n, so chromosome number will be 10.

Regards