Sexual Reproduction in Animals

Sexual Reproduction in Animals

Animals reproduce asexually or sexually. Sexual reproduction requires the union of sex cells known as gametes. Gametes are created through a process known as meiosis. In meiosis cell division produces cells with half the number of chromosomes of the original cell (haploid). During fertilization two haploid gametes join together thus forming a zygote. The zygote has complete chromosomes and is the first cell of the new organism. Sexual reproduction ensures genetic uniqueness. [BM] {EB}