Bio 132- Dihybrid Crosses

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4 Terms

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Chromosome theory of inheritance

  • genes are located at specific positions on chromosomes

  • behavior of chromosomes during meiosis and fertilization account for their inheritance patterns

    • chromosomes undergo segregation and independent assortment during meiosis to account for Mendel’s observations, conclusions

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Dependent assortment in dihybrid cross

  • traits of two characters remain together

<ul><li><p>traits of two characters remain together</p></li></ul><p></p>
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Independent assortment in dihybrid cross

  • traits of two characters separate

<ul><li><p>traits of two characters separate</p></li></ul><p></p>
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Inheritance of one character has no effect on the other. WHY?

  • each pair of alleles for a given character segregates independently of the other pair during meiosis

    • law of independent assortment!