Meiosis gamete production with turning point

Reduction-Division Genetic Recombination

[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

Polar Bodies (die) 2n=46 human sex cell diploid (2n) n=23 n=23 Meiosis I n=23 egg Haploid (1n) Meiosis II

[object Object],nuclear membrane nucleolus cell membrane chromatin

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Prophase I

Homologous chromosomes sister chromatids sister chromatids Tetrad

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

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

[object Object],[object Object],[object Object],[object Object],TETRAD centrioles spindle fiber aster fibers

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

metaphase plate OR metaphase plate

[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

[object Object],[object Object],[object Object],[object Object],[object Object],0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

[object Object],[object Object],[object Object],[object Object],0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

[object Object],metaphase plate metaphase plate

[object Object],[object Object],[object Object],[object Object],[object Object],1n Sperm cell fertilizes 1n egg to form 2n zygote

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],[object Object],Male - XY

Female - XX Down Syndrome – Trisomy 21

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

[object Object],[object Object],[object Object],[object Object],20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

[object Object],[object Object],[object Object],[object Object],[object Object],1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 20

Meiosis gamete production with turning point

Meiosis gamete production with turning point

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Meiosis gamete production with turning point

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