homologous definition biology
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autologous homologous - corresponding or similar in position or structure or function or characteristics; especially derived from an organism of the same species; a homologous tissue graft. autologous - derived from organisms of the selfsame individual; autologous blood donation.
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Homology (biology) In the context of biology, homology is the existence of shared ancestry between a pair of structures, or genes, in different species. A common example of homologous structures in evolutionary biology are the wings of bats and the arms of primates.Evolutionary theory explains the existence of homologous structures adapted to different purposes as the result of descent with modification from a common ancestor. common example of homologous structures in evolutionary biology are the wings of bats and the arms of primates. Evolutionary theory explains the existence of homologous structures adapted to different purposes as the result of descent with modification from a common ancestor.
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Meiosis homologous Chromosomes. The two chromosomes that make up a matched pair in a diploid cell. They are of the same length, centromere position, and staining pattern and possess gene for the same characteristics at corrosponding loci. One homologous chromosomeis inherited from the organism's father, and one grom the mother.
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- Homologous chromosomes, or homologs, consist of the members of any given chromosome pair. One member of the homolog is the chromosome from the mother and the other member is from the father. During meiosis, homologs pair together.
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homology homology. (biology). A fundamental similarity between structures or processes in different organisms that usually results from their having descended from a common ancestor. (chemistry). The relation among elements of the same group, or family, in the periodic table.
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homologue Definition of homologue. : something (such as a chemical compound or a chromosome) homologous.
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autologous autologous (otol´ôtol) , əgəs adj in, biology refers to, tissues, cells or proteins that are transplanted from one part of a'patient s body to. Another in, dentistry autologous bone grafts are used in the reconstruction of the mandible and the reconstruction of alveolar defects prior to dental. implants
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Homologous recombination Homologous recombination is a type of genetic recombination in which nucleotide sequences are exchanged between two similar or identical molecules of DNA. It is most widely used by cells to accurately repair harmful breaks that occur on both strands of DNA, known as double-strand breaks.
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- Define homologous: having the same relative position, value, or structure: such as; exhibiting biological homology — homologous in a sentence having the same relative position, value, or structure: such as; exhibiting biological homology…
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- Define Homologs. Homologs synonyms, Homologs pronunciation, Homologs translation, English dictionary definition of Homologs. n. Variant of homolog. or n 1. biology a homologous part or organ 2. chem any homologous compound n. 1. something homologous. 2. any member of a homologous...
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- Homologous structures are parts of the body that are similar in structure to other species' comparative parts. Scientists say these similarities are evidence that life on earth share a common ancient ancestor from which many or all other species have evolved over time.
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- If both alleles at a gene (or locus) on the homologous chromosomes are the same, they and the organism are homozygous with respect to that gene (or locus). If the alleles are different, they and the organism are heterozygous with respect to that gene.
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uniform homogenous - all of the same or similar kind or nature; a close-knit homogeneous group. homogeneous. undiversified - not diversified. uniform, unvarying - always the same; showing a single form or character in all occurrences; a street of uniform tall white buildings.
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Analogous Structures: Definition & Examples Many species have similar traits because they are descendants of a single common ancestor. These species developed from a single source and are related to a certain degree despite their current differences. The traits they share are known as homologous structures.Homologous structures are similar in structure and function because they originated from the same ancestor long ago. Species may also have similar traits even though they are not related to each other.This usually results because the species live in similar environments and fill similar ecological roles. The structures in this case are known as analogous structures.The process that brings these traits forward is called convergent evolution. Convergent evolution is natural selection that favors the same type of structure in different ancestors.owever, even though these wing structures serve the same function for these different animals, the bone structures, wing coverings (such as feathers, scales, hair, etc.), shapes, and sizes are quite different. Another example of an analogous trait is fins.
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- Homologous structures are parts of the body that are similar in structure to other species' comparative parts. These similarities are evidence that life on Earth has a common ancient ancestor that the diverse species have evolved from over time.omologous structures are parts of the body that are similar in structure to other species' comparative parts. These similarities are evidence that life on Earth has a common ancient ancestor that the diverse species have evolved from over time.
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How are analogous and homologous structures different? Homologous structures refer to structures on different species that are similar in function and their evolutionary origin. Analogous structures are similar in function but do … not share a similarity in evolutionary origin.
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- Homologous structures are structures that indicate a related evolutionary ancestry, not just similarity. For example, the flipper of a whale, the wing of a bird, and the arm o … f a a human are similar in their bone structure. Analogous structures are structures that are similar in appearance and function but are not the result of shared ancestry.
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- Homologous structures refer to structures on different species that are similar in function and their evolutionary origin. Analogous structures are similar in function but do …not share a similarity in evolutionary origin.
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- Main Image: Homologous recombination is a type of genetic recombination in which nucleotide (molecules which are joined make the structural units of RNA and DNA) sequences are exchanged between two similar or identical molecules of DNA.
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- In biology, two things are homologous if they bear the same relationship to one another, such as a certain bone in various forms of the hand. Ray Lankester defined the terms homogeny, meaning homology due to inheritance from a common ancestor, and homoplasy, meaning homology due to other factors.
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Anatomy, Evolution, and the Role of Homologous Structures Homologous structures are parts of the body that are similar in structure to other species' comparative parts. 1  These similarities are evidence that life on Earth has a common ancient ancestor that the diverse species have evolved from over time. The common ancestry of the species can be seen in the structure and development of these homologous structures, even if their function is different.
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- Noun. 1. homology-the quality of being similar or corresponding in position or value or structure or function. similarity-the quality of being similar. 1  Facebook.
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What are homologous structures? Homologous structures are body parts that are alike because the species in question share a common ancestor. These structures may serve the same or different functions.For example, the wing of a bird and the arm of a human serve very different functions, but are considered homologous structures because of the evolutionary relationship between birds and humans.tructures that are embryologically similar, but have different functions, are called homologous structures. Though these animals look different, a comparison of homologous structures indicates that they are quite similar. This suggests that these animals evolved from a common ancestor.   by: Lameace[=.
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Homology (biology) In the context of biology, homology is the existence of shared ancestry between a pair of structures, or genes, in different species. A common example of homologous structures in evolutionary biology are the wings of bats and the arms of primates. Evolutionary theory explains the existence of homologous structures adapted to different purposes as the result of descent with modification from a common ancestor.
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- Homologous recombination is the exchange of DNA strands of similar or identical nucleotide sequence. It can be used to direct error-free repair of double-strand DNA breaks and generates sequence variation in gametes during meiosis.
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homologous homologous in Science Expand. Similar in structure and evolutionary origin but having different functions, as a human's arm and a seal's flipper. Being one of a pair of chromosomes, one from the female parent and one from the male parent, that have genes for the same traits in the same positions. Genes on homologous chromosomes may not have the same form, however.