Epigenetic modifications are not genetic variations in the strict sense, as they do not involve changes to the DNA sequence itself.

Genetic inheritance, genetic transmission, and genetic transfer are all terms used to describe the process by which genes are passed from parents to offspring.

Genotype refers to the genetic makeup of an individual, including all of the alleles they carry for a particular gene or set of genes.

Phenotype refers to the observable characteristics of an individual, such as their physical appearance, behavior, and physiological traits.

Mitochondrial inheritance is not a type of genetic inheritance in the same way as autosomal and X-linked inheritance, as it involves the transmission of genetic material from the mother to her offspring through the mitochondria.

Behavioral genetics, genetic psychology, and behavioral genomics are all terms used to describe the study of the genetic basis of behavior.

Genome-wide association studies (GWAS) are not a method used to study the genetic basis of behavior, as they are used to identify genetic variants associated with diseases and other traits.

Pleiotropy is the phenomenon in which a genetic variant is associated with multiple traits.

Epistasis is the phenomenon in which two genetic variants interact to produce a particular trait.

Gene-environment correlation is not a type of gene-environment interaction, but rather a general term used to describe the relationship between genes and the environment.

Gene-environment interaction is the phenomenon in which a genetic variant is associated with a particular trait in one environment but not in another.

Polymerase chain reaction (PCR) is not a type of genetic testing, but rather a technique used to amplify DNA.

Genetic testing, genetic counseling, and genetic screening are all terms used to describe the process of using genetic information to predict an individual's risk of developing a particular disease or trait.

Multifactorial disorders are not genetic disorders in the strict sense, as they are caused by a combination of genetic and environmental factors.

A single-gene disorder is a genetic disorder caused by a mutation in a single gene.