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Dominant and recessive traits Transitional Reasoning Practice

Biology · Heredity · Biology · Mendelian Genetics

1 Biology practice questions on Dominant and recessive traits. Questions that build towards applied reasoning.

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Questions

  1. 1.

    A biologist crosses two mice that both display smooth fur. Among their numerous offspring, approximately 75% have smooth fur, while 25% have rough fur. Based on these observed phenotypic ratios, which deduction correctly identifies the dominant trait and the genetic constitution of the parent mice?

    • A) Rough fur is the dominant trait, and both parent mice are homozygous dominant.
    • B) Smooth fur is the recessive trait, and both parent mice are homozygous recessive.
    • C) Smooth fur is the dominant trait, and both parent mice are heterozygous.
    • D) Rough fur is the dominant trait, and one parent is heterozygous while the other is homozygous.

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