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29 May, 14:48

AaBb people are crossed to aabb people. The following progeny were observed: 5 AaBb, 45aaBb, 45 Aabb, 5 aabb. Two of the AaBb progeny were then crossed to each other. Which of the following would be the non recombinant chromosomes in this cross (AaBbxAaBb) ? a. AB and abb. aB and abc. Ab and abd. aB and Ab

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  1. 29 May, 14:58
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    Non recombinant chromosomes in this cross are

    A) AB and ab and

    D) aB and Ab because

    both these produces AaBb progeny

    Explanation:

    Cross between AaBb X aabb

    Gametes formed AB, Ab, aB, ab X ab, ab, ab, ab

    Progeny produced = 5 AaBb, 45 aaBb, 45 Aabb, 5 aabb.

    AaBb progeny crossed again AaBb X AaBb

    Gametes formed AB, Ab, aB, ab X AB, Ab, aB, ab

    Progeny produced

    AB Ab aB ab

    AB AABB AABb AaBB AaBb

    Ab AABb AAbb AaBb Aabb

    aB AaBB AaBb aaBB aaBb

    ab AaBb Aabb aaBb aabb

    Non recombinant chromosomes in this cross are

    A) AB and ab and

    D) aB and Ab because

    both these produces AaBb progeny
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