WHAT ARE REPRODUCTIVE CELLS LIKE?

There are two types of human reproductive cells which are called gametes: the female egg cell (ovum) and the male sperm cell (spermatozoon). A female egg is round and much larger than a sperm cell. A sperm cell has a small head and a long tail which helps it to move around.

Egg cell, Henry Vandyke Carter
[Public domain], via Wikimedia Commons

Sperm cells, By Bobjgalindo (Own work)
[GFDL (http://www.gnu.org/copyleft/fdl.html)
or CC BY-SA 4.0-3.0-2.5-2.0-1.0
(http://creativecommons.org/licenses/by-sa/4.0-3.0-2.5-2.0-1.0)],
via Wikimedia Commons

Sperm cell and egg cell fusing, via Wikipedia.

Reproduction can be sexual or asexual.
In sexual reproduction the male and the female gametes combine to produce a fetus and contains DNA from each one.