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9 October, 08:00

A seed dealer wants to sell four-o'clock seeds that will produce only red, white, or pink flowers. explain how this should be done.

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  1. 9 October, 08:28
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    Answer

    Four-O'clock plant (Mirabilis jalapa) follow the phenomenon of co-dominance.

    Co-dominance

    Co dominance is a relationship among allele where both allele contribute to the phenotype of heterozygote.

    Explanation

    Japanese 4 o clock plats have two types of flower in their parental generation that is red and white. When these parents are crossed a new plant with pink colour is also observed in their F1 generation as shown in cross below.

    Parental generation

    Phenotype Red Flower x White Flower

    Genotype RR rr

    Gametes R, R r, r

    F1 generation Rr, Rr, Rr, Rr ... Pink Flower.

    Result

    The allele contributes in the phenotype of flower and pink flowers are produced.
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