The genotype of an organism refers to

Answer and explanation

Correct answer: D. the combination of alleles it carries

  1. Step 1: Genotype is the allele combination; phenotype is how it is expressed.
Answer
the combination of alleles it carries.
Why not the others: the physical appearance of the organism: this is the phenotype. the number of chromosomes in its cells: this is the chromosome number. the type of environment where it lives: this is its habitat.

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