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10 January, 18:35

In certain bacteria, an oval shape (O) is dominant over round (o) and thick cell walls (T) are dominant over thin (t). Show a cross between a heterozygous oval, thick cell walled bacteria with a round, thin cell walled bacteria. What are the phenotypes of the F1 and F2 offspring

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  1. 10 January, 22:04
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    Phenotypes -

    Oval Thick - OoTt

    Oval Thin - Oott

    Round Thick - ooTt

    Round thin - oott

    Explanation:

    Given -

    Allele "O" is dominant over allele "o"

    and allele for thick cell wall "T" is dominant over thin celled wall "t"

    Genotype of heterozygous oval, thick cell walled bacteria is OoTt

    Genotype of round, thin cell walled bacteria is oott

    The cross between the two parents will produce following offspring

    OT Ot oT ot

    ot OoTt Oott ooTt oott

    ot OoTt Oott ooTt oott

    ot OoTt Oott ooTt oott

    ot OoTt Oott ooTt oott

    Phenotypes -

    Oval Thick - OoTt

    Oval Thin - Oott

    Round Thick - ooTt

    Round thin - oott
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