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The terms male and woman usually do not apply in sexually undifferentiated species in which the men and women are isomorphic (glimpse the identical) and the gametes are isogamous (indistinguishable in measurement and condition), this sort of as the environmentally friendly alga Ulva lactuca. In either situation, gametes may well be externally identical (isogamy) as in the green alga Ulva or might be distinct in dimension and other factors (anisogamy). The dimensions change is greatest in oogamy, a form of anisogamy in which a little, motile gamete combines with a considerably more substantial, non-motile gamete. Each gamete in the offspring thus has 50 percent of the genetic content of the mother and half of the father. By conference, the larger sized gamete (identified as an ovum, or egg cell) is thought of woman, while the smaller gamete (called a spermatozoon, or sperm cell) is regarded as male. Male vegetation and animals produce more compact gametes (spermatozoa, sperm) although females deliver much larger types (ova, usually named egg cells). In crops, the diploid organism provides haploid spores by meiosis that are capable of undergoing repeated cell division to create multicellular haploid organisms. In animals, the haploid stage only happens in the gametes, the haploid cells that are specialised to fuse to type a zygote that develops into a new diploid organism.
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