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The nucleus is located within the head region of the sperm cell.The DNA within the nucleus is densely packed, and the cell does not contain much cytoplasm.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.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 the reproductive system organs called gonads.

Human sex cells contain one complete set of 23 chromosomes.

Through a sequence of steps, the replicated genetic material in a parent cell is distributed among four daughter cells.

Meiosis produces gametes with one-half the number of chromosomes as the parent cell.

When sex cells unite during fertilization, the haploid cells become a diploid cell.

The production of sperm cells is known as spermatogenesis.

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The vast majority of sperm released never reach the ovum.

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