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Epistasis Knowledge-Based Practice

Biology · Heredity · Biology · Non-Mendelian Genetics

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

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Questions

  1. 1.

    A cross between two individuals heterozygous for two independently assorting gene loci (AaBb×AaBbAaBb \times AaBb) produces a modified phenotypic ratio of 9:3:4 in the offspring because one homozygous recessive gene masks the expression of alleles at the second locus. Which genetic phenomenon is responsible for this pattern of inheritance?

    • A) Incomplete dominance
    • B) Codominance
    • C) Recessive epistasis
    • D) Pleiotropy

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