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Incomplete dominance Knowledge-Based Practice

Biology · Heredity · Biology · Non-Mendelian Genetics

1 Biology practice questions on Incomplete dominance. Questions that assess core concepts and understanding.

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  1. 1.

    In snapdragons (Antirrhinum majus), flower color is governed by incomplete dominance, where homozygous plants are either red (CRCRC^R C^R) or white (CWCWC^W C^W), and heterozygous plants (CRCWC^R C^W) produce pink flowers. What is the expected phenotypic ratio among the offspring produced by crossing two pink-flowered snapdragons?

    • A) 1 red : 2 pink : 1 white
    • B) 3 red : 1 white
    • C) 2 red : 1 pink : 1 white
    • D) 3 pink : 1 white

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