sperm

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. Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while some red algae and fungi produce non-motile sperm cells, known as spermatia. Flowering plants contain non-motile sperm inside pollen, while some more basal plants like ferns and some gymnosperms have mot