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23 September, 16:51

Radish flowers may be red, pink, or white. the part of the radish we eat may be oval or long. a cross between a red-flowered long radish plant and a white-flowered oval radish plant yields all pink-flowered long radish offspring. when the f1 are cross, the what proportion of the f2 generation would be expected to be pink-flowered long radish plants?

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  1. 23 September, 17:03
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    Let's suppose that "long" is the dominant allele and "oval" is the recessive allele.

    let's suppose also that red + white genotype give a pink phenotype

    every radish has 2 genotypes for each gene, one from the mother and one from the father

    The proportions are: if the radish are homozygotes

    red red; long long x white white; oval oval

    red white oval long; red white oval long; red white oval long; red white oval long

    We will have 100% of pink - long radish.

    A crossmatch from homozygotes species give always a unique phenotype
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