Non-Mendelian Genetics definitions Flashcards

Observable traits of an organism resulting from the interaction of its genetic makeup and environmental influences.

A single phenotype is influenced by multiple genes, each contributing to the trait's variation, such as human skin color or height.

A segment of DNA that encodes functional products, typically proteins, influencing specific traits or functions in an organism.

A variant form of a gene at a specific locus on a chromosome, responsible for different traits.

A classification system for human blood based on the presence or absence of antigens A and B on red blood cells, determined by a single gene with three alleles: I^A, I^B, and i.

The result of polygenic inheritance where multiple genes contribute to the production of melanin, determining the color of human skin.

A pleiotropic genetic disorder involves a single gene mutation that results in multiple, diverse phenotypic effects throughout the body.

A single gene influences multiple, seemingly unrelated phenotypic traits.

A condition caused by abnormalities in chromosome number or structure, leading to multiple phenotypic changes and often affecting various body systems.

When one gene masks or modifies the expression of another gene, affecting the phenotype.

When two alleles blend to produce an intermediate phenotype, neither allele is completely dominant over the other.

When both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that shows both traits equally.

Phenotypes influenced by both genetic and environmental factors, such as height or skin color, where multiple genes and external conditions collectively determine the trait.