06_Dihybrid_Mitosis_Meiosis

06_Dihybrid_Mitosis_Meiosis - Dihybrid...

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Dihybrid crosses, Mitosis and Meiosis Today’s questions: How are alleles from different genes transmitted to offspring (together, or independently of each other?) What is the physical basis of Mendel’s rules? I. Mitosis: How cells divide during asexual reproduction and during growth II. Meiosis: How cells divide prior to formation of eggs and sperm (sexual reproduction)
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endel’s actual results (seed color and seed shape cross); Mendel s actual results (seed color and seed shape cross); Y = yellow, y = green R = round; r = wrinkled YRR rr YYRR x yyrr F 1 s all make yellow, round seeds ( YyRr ) When F 1 s are self fertilized, phenotypes of F 2 offspring are: yellow round: green round: yellow wrinkled green wrinkled TAL TOTAL:
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Note: other combinations of two traits behaved the same way. Mendel’s conclusion: The segregation of each pair of lleles ccurs alleles occurs This is the principle of Note: The
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Take home messages on the question of heritable variation (Darwin’s dilemma)
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06_Dihybrid_Mitosis_Meiosis - Dihybrid...

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