A
gametid is a complimentary gamete to the gamete that gives rise to a
zygote after conception. During
meiosis, four gametes, or haploid cells, are the products of
diploid cell division. Two gametes, one egg and one sperm, unite during conception, yielding a
zygote. For each gamete that makes a zygote, there is a complimentary gamete, or
gametid. There are gametids for both egg and sperm gametes. Another word for a
gametid is a nontransmitted gamete. These
gametids come from the same primary gametocyte that yields the gamete that fuses to form the
zygote.
Gametids do not always develop into mature gametes. A common example of a
gametid that does not develop into a mature gamete is a
polar body.
Gametogenesis is the process by which mature gametes are produced. In sequential order, gametes develop from primary gametocytes, to secondary gametocytes, to
gametids, and then finally to gametes.