Definition

1. Noun:
   • Genes located on the same chromosome: "Linked genes" refers to two or more genes that are physically located on the same chromosome. Because they are close together on the chromosome, they tend to be inherited together during meiosis, rather than assorting independently.

Usage

• The term "linked genes" is used primarily in the field of genetics. It describes a specific genetic principle where the probability of two genes being inherited together is greater than 50% due to their physical proximity on a chromosome. This contrasts with Mendel's law of independent assortment.
• It is typically used in scientific writing, biology textbooks, and discussions of inheritance patterns.

Examples

• Noun:
  • The discovery of linked genes provided evidence that genes are carried on chromosomes.
  • In fruit flies, the genes for eye color and wing size are linked genes.
  • Geneticists study linked genes to create chromosome maps.

Advanced Usage

• Linkage group: A set of linked genes located on the same chromosome. All genes in a linkage group tend to be inherited together.

  • The genes of Drosophila fall into four linkage groups, corresponding to its four pairs of chromosomes.

• Genetic linkage: The phenomenon itself, where alleles of linked genes are inherited together.

  • The strength of genetic linkage depends on the distance between the genes.

Variants and Related Words

• Linkage (n): The tendency for genes or other genetic markers to be inherited together because they are located near each other on the same chromosome.

  • Scientists measured the linkage between the two traits.

• To be linked (verb phrase): Describes the state of genes being on the same chromosome.

  • These two disease-causing alleles are linked.

Synonyms

• Genes in coupling (in specific contexts): Refers to linked alleles on the same chromosome.
• Syntenic genes: A broader term meaning genes located on the same chromosome, which may or may not show genetic linkage depending on distance.

Related Phrases

• Crossing over: The process during meiosis that can separate alleles of linked genes, resulting in recombinant offspring.

  • The frequency of crossing over between linked genes is used to map their positions.

• Recombination frequency: A measure of the distance between linked genes, calculated from the proportion of offspring that are recombinant.

  • A low recombination frequency indicates tightly linked genes.

Noun

1. any pair of genes that tend to be transmitted together
   • the genes of Drosophila fall into four linkage groups