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Multiple Choice
Which of the following best describes the term 'genotype' in genetics?
A
The genetic makeup of an organism, including all of its alleles.
B
The complete set of DNA, including all of its genes, in an organism.
C
The observable physical or biochemical characteristics of an organism.
D
Different forms of a gene found at the same locus on homologous chromosomes.
Verified step by step guidance
1
Step 1: Understand that 'genotype' refers to the genetic constitution of an organism, specifically the set of alleles it carries for particular genes.
Step 2: Differentiate 'genotype' from 'phenotype', where phenotype refers to the observable traits or characteristics resulting from the genotype and environmental influences.
Step 3: Recognize that the complete set of DNA, including all genes, is called the 'genome', which is broader than the genotype concept that usually focuses on specific genes or alleles.
Step 4: Identify that 'different forms of a gene found at the same locus on homologous chromosomes' are called 'alleles', which are components of the genotype but not the genotype itself.
Step 5: Conclude that the best description of 'genotype' is the genetic makeup of an organism, including all of its alleles.