Multiple Choice
Which of the following is NOT a human phenotype (an observable trait or characteristic)?
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1. Introduction to Genetics
Fundamentals of Genetics
Multiple Choice
Which of the following best describes a phenotype?
A
The observable traits of an organism resulting from the interaction of its genotype with the environment
B
The complete set of alleles an organism possesses at a particular gene locus
C
A heritable change in DNA sequence that creates a new allele
D
The physical location of a gene on a chromosome
Verified step by step guidance1
Understand that a phenotype refers to the observable characteristics or traits of an organism, such as height, eye color, or blood type.
Recognize that these observable traits result from the interaction between the organism's genotype (its genetic makeup) and environmental factors.
Differentiate phenotype from genotype, which is the complete set of alleles an organism has at a gene locus, not the traits themselves.
Note that a heritable change in DNA sequence creating a new allele is called a mutation, which affects genotype but is not the phenotype itself.
Remember that the physical location of a gene on a chromosome is called the gene's locus, which is a structural concept, not a description of phenotype.
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