An organism’s genotype is (1 point)
Responses
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.
an observable trait.
an observable trait.
a trait that is expressed in a homozygous individual
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, let's break down the options:
1. "An allele that is expressed whenever it is present" is not a correct description of genotype. Genotype refers to the genetic makeup of an organism and includes both the expressed and unexpressed alleles.
2. "The set of alleles an organism has for a trait" is the correct answer. Genotype refers to the collection of alleles an organism possesses for a particular trait. These alleles can be expressed (observable) or unexpressed.
3. "An observable trait" is actually referring to the phenotype, not the genotype. Phenotype is the physical or observable expression of an organism's genetic makeup.
4. "A trait that is expressed in a homozygous individual" is referring to a specific case where an individual has two identical alleles for a particular trait. It is not a definition of genotype as a whole.
So, to summarize, an organism's genotype is the set of alleles it has for a trait, which can include both expressed and unexpressed alleles.
The correct response is:
The set of alleles an organism has for a trait.