Cell Division 2

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

2n=46 human sex cell diploid (2n) n=23 n=23 meiosis I n=23 n=23 n=23 n=23 sperm haploid (n) meiosis II

[object Object],nuclear membrane nucleolus cell membrane chromatin

Homologous chromosomes sister chromatids sister chromatids Tetrad

Paternal Maternal eye color locus eye color locus hair color locus hair color locus

[object Object],[object Object],[object Object]

variation nonsister chromatids chiasmata: site of crossing over Tetrad

XX chromosome - female XY chromosome - male

centrioles spindle fiber aster fibers

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

metaphase plate OR metaphase plate

[object Object],[object Object]

[object Object],metaphase plate metaphase plate

[object Object],[object Object],[object Object],[object Object],[object Object]

2n=4 sex cell diploid (2n) n=2 n=2 meiosis I n=2 n=2 n=2 n=2 sperm haploid (n) meiosis II

[object Object],[object Object],n=23 egg sperm n=23 2n=46 zygote

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