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# Fertilization The human body develops from the fusion of gametes (sperm and egg). * **Sperm:** Created in the testes. * **Egg:** Created in the ovaries. The egg travels down the fallopian tube. The egg and sperm fuse when they meet, creating a zygote. Chromosomes are cut in half during me...

# Fertilization The human body develops from the fusion of gametes (sperm and egg). * **Sperm:** Created in the testes. * **Egg:** Created in the ovaries. The egg travels down the fallopian tube. The egg and sperm fuse when they meet, creating a zygote. Chromosomes are cut in half during meiosis, so that the resulting zygote has a complete set of chromosomes. Each parent provides 23 chromosomes, which when combined form a complete set of 46 chromosomes. ## Cell characteristics | Characteristic | Description | | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Karyogram | A diagram showing the ordered arrangement of chromosomes in a cell. | | Cell nucleus | The control center of the cell, containing the genetic material (DNA). | | Cell membrane | A thin layer that surrounds the cell, separating the inside from the outside. It controls what enters and leaves the cell. | | Nuclear pores | Tiny openings in the nuclear membrane that allow substances to move between the nucleus and the cytoplasm. | | DNA/RNA | Genetic material, DNA (deoxyribonucleic acid) provides the genetic instructions for making proteins; RNA helps carry out these instructions. | | Cell-cycle | A series of steps that cells go through to divide, including interphase and mitosis/meiosis. | | Mitosis/meiosis | Cell division processes for creating more body cells (mitosis) and sex cells (haploid cells – meiosis) | | Daughter cells | Cells produced from the division of a single cell, carrying on the life functions of the original cell. | **Note:** The image displays diagrams of a cell (including an egg and sperm cell) and the related biological processes.