Multiple Choice
In the fundamentals of genetics, what term refers to a version of a gene that can define a trait?
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1. Introduction to Genetics
Fundamentals of Genetics
Multiple Choice
In the context of fundamentals of genetics, which of the following is NOT a phenotype?
A
Blood type (e.g., type A)
B
Heterozygous genotype
C
Ability to roll the tongue
D
Seed color (yellow vs. green)
Verified step by step guidance1
Step 1: Understand the definition of phenotype. A phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.
Step 2: Recognize that blood type (e.g., type A), ability to roll the tongue, and seed color (yellow vs. green) are all observable traits, meaning they are phenotypes.
Step 3: Identify that 'heterozygous genotype Aa' refers to the genetic constitution (genotype) of an organism, not the observable trait itself.
Step 4: Differentiate between genotype and phenotype: genotype is the genetic code (e.g., Aa), while phenotype is the expression of that code (e.g., blood type A, ability to roll tongue).
Step 5: Conclude that the heterozygous genotype is NOT a phenotype because it is a description of the genetic makeup, not an observable characteristic.
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