Male or female reproductive cells (egg and sperm cells)

My answer -

Organisms that reproduce sexually do so via the production of sex cells, also called gametes. These cells are very different for the male and female of a species. In humans, male sex cells or spermatozoa (sperm cells), are relatively motile. Female sex cells, called ova or eggs, are non-motile and much larger in comparison to the male gamete. When these cells fuse in a process called fertilization, the resulting cell (zygote) contains a mix of inherited genes from the father and mother. Human sex cells are produced in reproductive system organs called gonads. Gonads produce sex hormones needed for the growth and development of primary and secondary reproductive organs and structures.

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