A spermatozoon or an ovum; a cell responsible for transmitting DNA to the next generation.
1 When size is irrelevant, other features of a sex cell determine its sex .
2 Imagine the world from a sex cell 's point of view.
3 A sex cell carries one complete set of your genes.
4 I mean a sex cell of a different sex .
5 Its mission is threefold: to find, recognize, and fuse with a suitable sex cell from the same species.
6 And imagine that you're in a population that has zero sexes - every sex cell can fuse with every other.
7 If you encounter a sex cell from the same parent, you can go ahead and fuse with it.
9 When a sex cell of yours fuses with a regular sex cell , the resulting cell, known as a zygote, will be smaller than usual.
10 By contrast, plants don't just rely on specialist sex cells to reproduce.
11 The anatomical difference between the sex cells of men and women is extreme.
12 This union of the male and female sex cells is called "fertilization."
13 But what force can favor making fewer, larger sex cells ?
14 Most of us are sterile because we even form antibodies to our own sex cells .
15 Or, to be more precise, sexes define which sex cells can fuse with each other.
16 Among animals, then, there are two types of sex cells , big (eggs) and small (sperm).
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