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11 July, 00:31

When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessive phenotype? A) 0% B) 25% C) 50% D) 75% E) 100%

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  1. 11 July, 04:09
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    C) 50%

    Explanation:

    Let the homozygous recessive organism be rr

    Let the heterozygote be Rr

    If both organism crosses together: Rr * rr

    = we have (Rr, Rr, rr, rr) as their offspring.

    The question says; what is the chance of producing an offspring with the homozygous recessive phenotype?

    From above, the chance of producing an homozygous recessive is 50%.

    i. e (2/4) * 100%

    = (1/2) * 100%

    = 50%
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