In ____, a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in heterozygotes.

A. pleiotropy
B. polygenic inheritance
C. complete dominance
D. codominance
E. a multiple allele system


Answer: D

Biology & Microbiology

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The different proteins characteristic of breast cancer subtypes can be used as _____ for proper diagnosis and

treatment.

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