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The Dihybrid Cross
Studying the inheritance of two characters simultaneously.
Mendel used peas again:
Was the inheritance of one character affected by the inheritance of another?
In other words, a dihybrid cross can be treated as two separate monohybrid crosses.
From this we can predict how many seeds we could expect to get in a sample:
In 556 seeds we could expect:
It appears that the inheritance of seed shape has no influence over the inheritance of seed colour. The two characters are inherited independently The pairs of alleles that control these two characters assort themselves independently = Mendel's Second Law, The Law of Independent Assortment.
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