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Codominance

Biology • Non-Mendelian Genetics • Transitional Reasoning • 1 questions

Codominance Transitional Reasoning Download PDF

Biology · Heredity · Biology · Non-Mendelian Genetics

1 Biology practice questions on Codominance. Questions that build towards applied reasoning.

Questions

  1. 1.

    A medical geneticist analyzes the red blood cell surface antigens of two prospective parents using anti-M and anti-N antibodies. Parent 1 produces only antigen M on erythrocyte membranes, whereas Parent 2 produces both antigen M and antigen N simultaneously on every erythrocyte. If these two individuals have children, which of the following correctly predicts the phenotypic distribution of their offspring?

    • A) 100% of the offspring will produce a single intermediate hybrid antigen due to the blending of parental traits.
    • B) 50% of the offspring will produce only antigen M, and 50% will produce both antigen M and antigen N.
    • C) 75% of the offspring will produce only antigen M, and 25% will produce only antigen N due to complete dominance.
    • D) 25% of the offspring will produce antigen M, 50% will produce both antigens, and 25% will produce antigen N.