FAQ: What Is A Homologue In Biology?

1. One member of a chromosome pair.2. A gene similar in structure and evolutionary origin to a gene in another species 3. In evolution, characteristics that are similar in different species because they come from a common ancestor. (

What does homologue mean?

having the same or a similar relation; corresponding, as in relative position or structure. corresponding in structure and in origin, but not necessarily in function: The wing of a bird and the foreleg of a horse are homologous. having the same alleles or genes in the same order of arrangement: homologous chromosomes.

What does homologous in biology mean?

1a: having the same relative position, value, or structure: such as. (1) biology: exhibiting biological homology. (2) biology: having the same or allelic genes with genetic loci usually arranged in the same order homologous chromosomes.

What is a homologue in cells?

Homologue: A chromosome that is similar in physical attributes and genetic information to another chromosome with which it pairs during meiosis. A member of homologous chromosome.

What are homologs in genetics?

A gene related to a second gene by descent from a common ancestral DNA sequence. The term, homolog, may apply to the relationship between genes separated by the event of speciation (see ortholog) or to the relationship betwen genes separated by the event of genetic duplication (see paralog).

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What does Logous mean?

a combining form meaning “ having a correspondence or relation” of the kind specified by the initial element: homologous. [< Latin -logus < Greek -logos.

What does analogous mean in science?

Scientific definitions for analogous Similar in function but having different evolutionary origins, as the wings of a butterfly and the wings of a bird. Similar in chemical properties and differing in chemical structure only with respect to one element or group.

What are fins homologous to?

The paired fins in fish and limbs in tetrapods are a good example of homologous organs. They were derived from locomotive organs in common ancestors of vertebrates, and they share many developmental processes and genetic networks.

What is homology in simple words?

The similarity of a structure or function of parts of different origins based on their descent from a common evolutionary ancestor is homology. Analogy, by contrast, is a functional similarity of structure that is based on mere similarity of use.

What is homologous give example?

The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. They are different and have a different purpose, but they are similar and share common traits. The tailbone of a human being and the tail of a monkey are examples of homology.

What are homologs orthologs and paralogs?

Orthologs are homologous genes in different species that diverged from a single ancestral gene after a speciation event and paralogs are homologous genes that originate from the intragenomic duplication of an ancestral gene.

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What happens to homologues during meiosis?

Abstract. During meiosis, homologous chromosomes undergo a reciprocal exchange of DNA to generate crossovers. Meiotic crossovers create physical connections between homologous chromosomes that are necessary for proper segregation at the first meiotic division, and also generate new combinations of alleles.

What are homologues in meiosis?

Homologous recombination is a type of genetic recombination that occurs during meiosis (the formation of egg and sperm cells). Paired chromosomes from the male and female parent align so that similar DNA sequences from the paired chromosomes cross over each other.

What is a protein homologue?

Two proteins are homologous if they have a common ancestor, whatever their sequences, structures, or functions. Homology = common ancestry. Homology may or may not result in Similarity: a single mutation leads to a homologous protein, and yet may drastically change the structure and/or function.

How do you find homologs of a gene?

Search the HomoloGene database with the gene name. If you know both the gene symbol and organism, use a query such as this: tpo[gene name] AND human[orgn]. If your search finds multiple records, click on the desired record. The homologous genes are listed in the top of the report.

What are homologs in organic chemistry?

Homolog: Structurally-similar molecules within a series with the same functional group but different numbers of some repeated groups such as CH2. This series of molecules is called homologous series.

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