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| Occurs in prophase 1 of meiosis, homologous chromosome cross dna alleles with eachother between X and Y. Sorts genes into gametes |
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| M/F inherit same gene, only the genes appropriate for the persons gender are turned on. Ex: guys beard and girls breasts |
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| 2n (Somatic/mitosis) contain 46 chromosome |
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| n half the number of chromosomes (23) |
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G1: Cell growth
S: synthesis/DNA replication
G2: Organelles divide, preparation for mitosis |
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| Chromosomes sort into two sets and the cytoplasm divides, one copy of each chromosome into two cells |
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| chromatin condense into chromosome, centrosome's move towards poles, nuclear membrane fragments and nucleolus disappears |
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| nuclear envelope is gone, spindle microtubules attach to chromosomes at centrioles |
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| Duplicated chromosomes align midway between poles of the cell (equator) |
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| Sister chromatid splits, pulled towards pole region, spindles elongate (Opposite poles) |
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| Telephase "Reverse prophase" |
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| Chromosome's are threadlike, nuclear envelope forms around each cluster, chromosomes de-condense into chromatin |
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| Division of cytoplasm, begins towards end anaphase; Cleavage furrow (plasma membrane is pulled around cell and pinched to make two cells) |
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| Parent cell contains 28 chromosomes and undergoes mitosis and cytokinesis the one daughter cell will contain how many chromosomes? |
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| 28 parent cells unergo mitosis and cytokinesis then ____ daughter cells will be produced |
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| two consecutive division of the chromosomes.2N to n for reproduction |
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| Separation of homolegous chromosomes |
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| Separation of sister chromatid NO REPLICATION OR INTERPHASE |
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| Homologous chromosomes pair up and break at the same place, exchange of segments of DNA |
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| homologous chromosome condense, pair up, and swap segments, nuclear envelope breaks |
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| Homologous pairs align midway between spindle fibers |
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| Homologous chromosomes separate and begin heading towards the spindle poles |
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| two clusters of chromosomes reach the spindle poles, new nuclear envelope forms so two haploid |
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| chromosomes condense, nuclear envelope gone |
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| Still duplicated chromosomes are aligned midway between spindles |
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| Sister chromatids separate, unduplicated chromosomes head to spindle poles. DISJUNCTION |
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| Cluster of chromosomes reach each spindle pole, nucleaer envelope encloses to form 4 haploid cells |
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| If a parent cell contains 28 chromosomes and undergo meiosis I and II then one daughter cell will contain....? |
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| If 28 parent cells undergo meiosis I and II then _____ daughter cells will be produced |
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