An organism’s genotype is (1 point) Responses an observable trait. an observable trait. a trait that is expressed in a homozygous individual. a trait that is expressed in a homozygous individual. an allele that is expressed whenever it is present. an allele that is expressed whenever it is present. the set of alleles an organism has for a trait. the set of alleles an organism has for a trait.
the set of alleles an organism has for a trait.
The correct answer is: the set of alleles an organism has for a trait.
The correct answer is: the set of alleles an organism has for a trait.
To understand why this is the correct answer, let's break down the question and the answer choices:
The question asks for the definition of an organism's genotype. The genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.
The answer choices provided are:
1. An observable trait: This does not accurately define genotype, as genotype refers to the genetic information, not the physical expression of traits.
2. A trait that is expressed in a homozygous individual: This is incorrect because genotype can refer to the alleles an organism possesses regardless of whether it is homozygous (has two identical alleles) or heterozygous (has two different alleles) for a trait.
3. An allele that is expressed whenever it is present: This is incorrect as well because an allele is a specific form of a gene, not the entire genetic makeup of an organism.
4. The set of alleles an organism has for a trait: This is the correct definition. The genotype includes all the alleles an organism possesses for a particular trait, regardless of whether they are expressed or not.
Therefore, the correct answer is "the set of alleles an organism has for a trait."