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Egg cell


noun, plural: egg cells

(1) Female gamete; female sex cell; female reproductive cell.

(2) Unfertilized ovum, which is typically haploid, especially in human females.


In humans, the ovum is the largest cell visible to the naked eye. It is about 0.1 mm in size in humans. It is produced in the ovary and eventually released into the fallopian tube during ovulation. It consists of protoplasm (with some yolk) surrounded by a thin cell wall (vitelline membrane). It may also have a noncellular covering (zona pellucida). Within the cell is a large nucleus (germinal vesicle), with a nucleolus (germinal spot). The cell is haploid so that when a sperm cell fertilizes it, it forms a diploid zygote.


Compare: sperm cell

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mitosis and miosis

In a nutshell: Mitosis- The division of a cell to create two identical new cells. Meiosis- The division of a cell into a gamete, ... 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

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: ...

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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


... bluebottle, do the four types of zooid all come from the one original cell? It's hard finding straight answers. It seems maybe they do all come from one fertilised egg, but maybe that's just every zooid WITHIN a given group of zooids, like the digestion ...

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by Waylah
Mon Sep 02, 2013 8:23 am
Forum: Zoology Discussion
Topic: siphonophores
Replies: 2
Views: 2084

Do chromosomses ever get competitive?

... gene? In contribution to ur topic, it is said that the x-sperm cell is faster than the y-sperm cell, so that whether y or x chromosome fertilizes the egg depends on the time of copulation with respect to ovulation.

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by Fearnot
Fri Aug 09, 2013 4:15 pm
Forum: Cell Biology
Topic: Do chromosomses ever get competitive?
Replies: 9
Views: 6960

why is the reproductive system immune to entropy?

... lives). However, there is a mechanism to prevent 'aging' in certain cells in the body, for example in blood cell progenitors and other stem cells ... is called natural selection: the embryos generated by healthy sperm and egg cells are more likely to develop into a human that survives to reproductive ...

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by biohazard
Wed Jun 12, 2013 9:44 am
Forum: General Discussion
Topic: why is the reproductive system immune to entropy?
Replies: 3
Views: 1860
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