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Sperm

Definition

noun, plural: sperms

The male gamete or reproductive cell involved in sexual reproduction. It is produced by a male organism that unites with the egg of a female organism forming a zygote.


Supplement

A sperm is a cell consisting of a round or cylindrical nucleated cell, a short neck, and a thin motile tail. Its structure is vital to its mobility and function (i.e. sexual reproduction). The compacted nucleus contains half of the genetic information. It fuses with an ovum (the female gamete) to form a zygote. In mammals, the sex is determined by the sperm cell. If it bears Y chromosome, the resulting offspring is a male. If X chromosome, the offspring is a female.


Word origin: Greek, from sperma, spermat-, seed.

Synonyms: spermatozoon, zoosperm.


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Colorblindness Probability Help!

The incidence of an XXY karyotype is about 1 in every 1000 male births, the extra X chromosome coming either from the mother's egg or the father's sperm by nondisjunction during meiosis. Suppose the baby's father has red-green colorblindness. Would you predict that the baby boy with an XXY karyotype ...

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by kaylagh
Sun Sep 07, 2014 6:07 am
 
Forum: Genetics
Topic: Colorblindness Probability Help!
Replies: 0
Views: 48

mitosis and miosis

... new cells. Meiosis- The division of a cell into a gamete, carrying half the genetic DNA of a normal cell, to fertilize another gamete (Example, sperm fertilizing an egg)

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by CaptainCovalency
Thu Jul 10, 2014 3:58 am
 
Forum: Cell Biology
Topic: mitosis and miosis
Replies: 2
Views: 1862

Human Gamete Compatibility Going Backwards

I'm not sure my question was worded very well. . . I'll provide more detail and less generic. If you could take human sperm back, say, 500 years and "test" it for compatibility with every female ovum you would find general compatibility. In other words, if a modern male ...

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by BiologicalRush
Tue Jun 24, 2014 9:01 pm
 
Forum: Evolution
Topic: Human Gamete Compatibility Going Backwards
Replies: 9
Views: 4388

Why can't sperm cells divide mitotically?

Hi,,, Can sperm cells or egg cells undergo mitotic division? I mean can a cell divide mitotically after meiosis? If not, why??? :roll: Thank you

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by Sue4
Sun Mar 02, 2014 10:07 am
 
Forum: Cell Biology
Topic: Why can't sperm cells divide mitotically?
Replies: 1
Views: 1132

Re:

... right-side gonad is switched on, it develops into a male sex organ called an ovotestis. Scientists have found that an ovotestis will produce sperm and this sexually reversed hen will try to mate with other hens in the flock. It is however, unknown whether a hen that has undergone a spontaneous ...

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by enarees
Mon Feb 03, 2014 4:57 pm
 
Forum: Zoology Discussion
Topic: Forced bird's parthenogenesis
Replies: 4
Views: 1755
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