Question

A diploid body cell from a fruit fly contains eight chromosomes.This means that

Answer 1

2n=8 ie each cell in the fruitfly's body has eight chromosomes except for the haploid gametes which will have n=4.

Answer 2

eight chromosomes which can divide and give rise to more cells by mitosis  and diploid cells r formed only by mitosis and not meiosis because meiosis gives haploid cells