Fertilisation
Videos
Fertilisation or fertilization, also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes to give rise to a zygote and initiate its development into a new individual o
Sperm and ovum fusing
In the bryophyte land plants, fertilisation takes place within the archegonium. This moss has been genetically modified so that the unfertilised egg within the archegonium produces a blue colour.
Red-veined darters (Sympetrum fonscolombii) flying "in cop" (male ahead), enabling the male to prevent other males from mating. The eggs are fertilised as they are laid, one at a time.
Sperm
Videos
Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction. Sperm cells contribute approximately half of the nuclear genetic information to the diploid offspring. Anim
Fertilisation
…interconnected sperm and the tube nucleus form the "male germ unit". Double fertilisation is the process in angiosperms (flowering plants) in which two sperm from each pollen tube fertilise two cells in a female gametophyte (sometimes called an embryo sac) that is inside an ovule. After the pollen tube enters…
Electron micrograph of human spermatozoa magnified 3140 times.
Human sperm stained for semen quality testing