6.2.3(Dihybrid inheritance

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4 Terms

1
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State what is meant by dihybrid inheritence

  • The inheritance of 2 characteristics controlled by 2 different genes(Extended punnet)

2
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State why dihybrid inheritance may not always occur

  • Due to sex linkage, autosomal or epistasis

3
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Give an example of a dihybrid cross and show the F2 punnet square, F2 genotypes, Parent phenotypes, F1 genotype, F1 genotype, gamete phenotypes and the ratio of phenotypes

  • Seed colour and shape:

<ul><li><p>Seed colour and shape:</p></li></ul><p></p>
4
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State the what the F2 genotype ratio always is

  • 9:3:3:1