Question

A cross section at the midpoint of the middle piece of a human sperm will show

(a) centriole, mitochondria and 9 + 2 arrangement of microtubules

(b) centriole and mitochondria

(c) mitochondria and 9 + 2 arrangement of microtubules

(d) 9 + 2 arrangement of microtubules only.

Answer 1

Correct option (c) mitochondria and 9 + 2 arrangement of microtubules

Explanation :

The cross section of the sperm midpiece shows the axial bundle of microtubules or axoneme surrounded by a microtubular sheath in which the mitochondria of the spermatid have become arranged in a helical manner. The microtubular structure provide the ability to the sperm to swim through the reproductive tract of the female. The microtubules are in 9 + 2 arrangement.