Arrange the following events of spermatogenesis.
I. The spermatogonia gives rise to 4 Primary spermatocytes (2n)
ii. The spermatogonia divides mitotically to maintain the germ cells (2n)
Iii. Spermiogenesis
Iv. Each primary spermatocyte gives rise to 2 secondary spermatocytes(n)
Which of the following networks are traversable? Give reasons.
(i)
(ii)
(iii)
(iv)
(v)
(vi)