The average male will produce about 525 billion sperm cells over a lifetime.
Worms have a very interesting method of reproduction. There are no male and female worms – all worms are the same and each produce both sperm cells and egg
Welcome to the companion Web site to “18 Ways to Make a Baby,” originally broadcast on October 9, 2001. The program investigates the brave new world of assisted
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring
Ploidy. Ploidy is the complete set of chromosomes in a cell. In humans most somatic cells are in a diploid state and only switch to a haploid state in gametes or sex
Jan 21, 2014 · See our updated meiosis video: https://youtu.be/VzDMG7ke69g The Amoeba teens cover meiosis and compare mitosis with meiosis! Music used with permission
Gamete refers to the individual haploid sex cell, i.e, the egg or the sperm. Zygote is a diploid cell formed when two gamete cells are joined by means of sexual
In humans and many other species, sex is determined by specific chromosomes. But how did researchers discover these so-called sex chromosomes? The chromosomes
Biology4s.com! This tutorial introduces cell structure. Other sections include plants, systems, invertebrates, vertebrates, and microorganisms.
Organisms of many species are specialized into male and female varieties, each known as a sex, with some falling in between being intersex. Sexual reproduction