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The cells produced in mitosis are body cells, as in all the cells except sex cells (gamete). Sperm form in the semeniferous tubules in the testes of a male. During meiosis one cell divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes of the parent cell they are haploid. Meiosis produces our sex cells or gametes (eggs in females and sperm in males). When sex cells unite during fertilization, the haploid cells become a diploid cell. This process occurs continuously and takes place within the male testes. Hundreds of millions of sperm must be released in order for fertilization to take place. Gametes are reproductive cells or sex cells that unite during sexual reproduction to form a new cell called a zygote. Male gametes are called sperm and female gametes are ova (eggs). Sperm are motile and have a long, tail-like projection called a flagellum. Ova are non-motile and relatively large in comparison to the male gamete. Chromosome, the microscopic threadlike part of the cell that carries hereditary information in the form of genes. For instance, the 46 chromosomes found in human cells have a combined length of 200 nm (1 nm 10 9 metre) if the chromosomes were to be unraveled, the genetic material they contain would measure roughly 2 metres (about 6.). The cells produced in mitosis are body cells, as in all the cells except sex cells (gamete). Male sex cells or sperm are motile and have long, tail-like projections called flagella. Female sex cells or ova are non-motile and relatively large in comparison to male gametes. In sexual reproduction, sex cells unite during fertilization to form a new individual. While other body cells replicate by mitosis, gametes reproduce by meiosis. There are 24 chromosomes in the body cells and 12 chromosomes in the sex cells describe what happens to the number of chromosomes when two grasshopper sex cells join in fertilization. When the two grasshopper cells join the newly formed cell has exactly double the number of chromosomes as a single sex cell, and exactly the same number of chromosomes as a body cell. The diploid chromosome number is the number of chromosomes within a cells nucleus.

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