Mature sperm cell

Description:All normal cells have 46 chromosomes but sperm have half that number or, Each pollen grain contains a spermatogenous generative cell. Almost all living animals, from worms to insects to humans, possess a gene known as Boule BOULE , which functions solely in sperm production. In flowering plants , sperm nuclei are produced inside pollen. Over the course of a guy's life, he'll produce more than 12 trillion sperm. Before the tube reaches the ovule , the nucleus of the generative cell in the pollen grain divides and gives rise to two sperm nuclei, which are then discharged through the tube into the ovule for fertilization. You might not also realize that when sperm are initially formed within the testicles, they lack the ability to swim forward or fertilize an egg until they make their way through the reproductive tract.

Views: 7569 Date: 2018-09-27 Favorited: 95