meiosis 0.0 / 5 ? BiologyCellular processes and structureA2/A-levelOCR Created by: bethen0303Created on: 29-10-16 20:43 haploid half the chromosomes (egg and sperm) 1 of 17 diploid full amount of chromosomes 2 of 17 gametes haploid made by meiosis 3 of 17 stages of meiosis prophase 1, metaphase 1, anaphase 1, telophase 1, prophase 2, metaphase 2, anaphase 2, telophase 2. 4 of 17 prophase 1 chromatin condenses; bivalents form; chiasmata; crossing over occurs 5 of 17 metaphase 1 bivalents line up along equator; chiasmata still present, random assortment of chromosomes. 6 of 17 anaphase 1 independent segregation (homologous pairs pulled to opposite poles); centromeres dont divide; chismata seperate. 7 of 17 telophase 1 animals - 2 nuclear envelopes form and cell divides by cytokinesis making 2 haploid cells. plant - skips this stage 8 of 17 prophase 2 nuclear envelope breaks down; centrioles replicate; chromosomes condense; spindle fibres form at right angles to axis in 1. 9 of 17 metaphase 2 random assortment of chromatids on spindle equator 10 of 17 anaphase 2 centromeres divide; chromatids pulled to opposite poles; chromatids randomly segregate. 11 of 17 telophase 2 nuclear envelope reforms creating 4 haploid cells. 12 of 17 4 types of mutation inversion, deletion, translocation, non-disjunction 13 of 17 inversion part of the chromosome turns 180* 14 of 17 deletion part of the chromosome is lost 15 of 17 translocation a section of the chromosome become attatched to another 16 of 17 non-disjunction homologous chromosomes fail to seperate propelry during meiosis 1 or chromatids fail to seperate at meiosis 2. 17 of 17
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