an organism's genotype is
an observable trait
a trait that is expressed in a homozygous individual
the set of allele that is expressed whenever it is present
None of the above statements accurately describe an organism's genotype. An organism's genotype refers to the specific combination of alleles (alternate forms of a gene) present in its DNA. It is not directly observable as it is contained within the organism's genetic material.
An organism's genotype refers to the genetic makeup or combination of alleles that an individual possesses for a certain trait. It includes the complete set of genes or alleles present in an individual's DNA.
It is not an observable trait itself but rather determines the potential expression of certain traits.
A trait that is expressed in a homozygous individual refers to a genotype where both alleles for a particular gene are the same. In this case, the trait associated with that gene will be expressed.
Lastly, the set of alleles that is expressed whenever it is present is referred to as the phenotype. The phenotype is the observable physical or physiological characteristic that results from the interaction between an organism's genotype and the environment.
An organism's genotype refers to the genetic makeup or combination of alleles it possesses for a particular trait. Alleles are alternative forms of a gene that determine the various characteristics or traits exhibited by an organism.
To determine an organism's genotype, you need to consider the specific alleles it carries for a particular trait. Each individual has two copies of each gene, one inherited from each parent. These copies can be the same (homozygous) or different (heterozygous).
1. An observable trait: The genotype influences the phenotype, which is the observable trait or characteristic expressed by the organism. The phenotype results from the interaction between the organism's genotype and the environment. For example, if an organism has the genotype for blue eye color, its observable trait or phenotype would be blue eyes.
2. A trait that is expressed in a homozygous individual: In genetics, homozygous individuals have the same alleles for a specific gene. If a particular trait is expressed only in homozygotes, it means that both copies of the gene must be the same for the trait to be observed. For example, in humans, having two copies of the recessive allele for albinism (aa genotype) is necessary to express the albino phenotype.
3. The set of alleles that is expressed whenever it is present: The genotype consists of the complete set of alleles an organism has for a specific gene or trait. In some cases, the expression of a certain allele might be dominant over others, leading to the expression of that allele's trait. The presence of a dominant allele usually leads to the expression of its associated trait, irrespective of the other allele present. However, the presence of a recessive allele might cause the trait associated with it to be expressed only if there are no dominant alleles present.
To determine an organism's genotype, you need to analyze its DNA or perform genetic tests to identify the alleles present at a specific locus or gene. Different methods can be employed, such as DNA sequencing or genetic crosses, to uncover an individual's genotype or the alleles they carry for a particular trait.