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Old 04-12-2012, 08:30 PM   #74
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A gamete (from Ancient Greek γαμέτης gametes "husband" / γαμετή gamete "wife") is a cell that fuses with another cell during fertilization (conception) in organisms that reproduce sexually. In species that produce two morphologically distinct types of gametes, and in which each individual produces only one type, a female is any individual that produces the larger type of gamete—called an ovum (or egg)—and a male produces the smaller tadpole-like type—called a sperm...The name gamete was introduced by the Austrian biologist Gregor Mendel. Gametes carry half the genetic information of an individual, 1n of each type....REALLY !!!

From rendition of a relief impression of the royal libation cup of King Gudea of Lagash (Sumer), ca 2000 BC, depicting Ningishzida (also Ningishzidda and assorted other spellings) in its twin serpent form, precursor to the Caduceus of Hermes...

Historically, the two astrological symbols had distinct meanings in alchemical and astrological principles. Some medical organizations join the serpents of the caduceus with rungs to suggest a DNA double-helix...
In humans, an ovum can carry only an X chromosome (of the X and Y chromosomes), whereas a sperm may carry either an X or a Y; thus the male sperm determines the sex of any resulting zygote, if the zygote has two X chromosomes it will develop into a female, if it has an X and a Y chromosome, it will develop into a male. For birds, the female ovum determines the sex of the offspring, through the ZW sex-determination system...

A frozen zoo is a storage facility in which genetic materials (e.g. DNA, sperm, eggs, and embryos) are gathered and thereafter stored at very low temperatures for optimal preservation over a long period of time The frozen zoo could provide the valuable material to produce genetically superiour stock...The 'frozen zoo' can be defined as a collection of genes in the form of frozen semen and embryos. In practical terms this is a collection of sperm-holding straws stored in liquid nitrogen tanks...In vitro fertilisation (IVF) is a process by which an egg is fertilised by sperm outside the body: in vitro. IVF is a treatment when other methods have failed...

Last edited by lightgiver; 04-12-2012 at 09:11 PM.
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