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AP Biology Unit 4.6 - Meiosis Flashcards

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9450659531Haploida cell that has only a single copy of each chromosome (n)0
9450659532Diploida cell that contains two copies of each chromosome (2n)1
9450659533Somatic CellsAny cells in the body other than reproductive cells; body cells2
9450659534Gametessex (= germ) cells (sperm and egg)3
9450659535Homologous Chromosomespairs of chromosomes that have the same size and same sets of genes; one of each pair comes from each parent4
9450659536FertilizationFusion of an egg and sperm cell to form a zygote.5
9450659537ZygoteDiploid cell formed when a sperm fertilizes an egg.6
9450659538MitosisA process in which cells are divided to produce two identical diploid cells7
9450659539MeiosisA reduction-division process in which a single diploid cell produces four haploid gametes8
9450659540Meiosis IStage of meiosis in which homologous chromosomes separate9
9450659541Meiosis IIStage of meiosis in which sister chromatids separate; results in formation of 4 haploid sex cells.10
9450659542GametogenesisThe production of gametes; forms 4 sperm in males, 1 egg and 3 polar bodies in females.11
9450659543SpermHaploid male gamete12
9450659544EggHaploid female gamete.13
9450659545Polar Bodies3 cells produced during female gametogenesis that have little more than DNA that are eventually broken down; do not become eggs.14
9450659546Crossing OverExchange/swapping of genetic material between homologous chromosomes during meiosis I15
9450670068TetradEach pair of homologous chromosomes that come together during Prophase I of Meiosis16
9450672253SynapsisThe side by side pairing of homologous maternal and paternal chromosomes at the start of meiosis; forming of tetrads.17
9450675329ChiasmataPoints where chromatids cross-over during meiosis18
9450677494Independent AssortmentThe law stating that pairs of genes separate independently of one another in meiosis.19

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