Biology
Coined: Although the notion of a gene was began with Gregor Mendel?s work on pea plants (1866), the term gene was coined by Wilhelm Johannsen (1857 - 1927), a Danish botanist and geneticist, in his translated to German book ? Elemente der exakten Erblichkeitslehre.? In this book Johannsen in 1909 used the term ?gene? in order to describe the fundamental physical and functional units of heredity. This term was coined to describe Mendel's factors of inheritance and it was in opposition to the then common pangene that stemmed from Darwin's theory of pangenesis*. In the 1940s and early 1950s, experiments pointed to DNA as the portion of chromosomes that held genes.
- Mendelian Genetics Part No. 1 - Defining Key Vocabulary
Solving Mendelian genetics problems can seem somewhat daunting from the onset, especially with the vocabulary that is associated with them. Here we will define key terms that are used in genetics problems, but also, walk you through the proper steps needed...
- Genetic Terms
Genotype is the genetic composition of an organism. Phenotype is the set of characteristic manifested by an organism. An individual has a heterozygous condition if he has 2 different alleles of the same gene An individual has a homozygous condition if...
- Genes Are Dna
Key Terms:The genome is the complete set of sequences in the genetic material of an organism. It includes the sequence of each chromosome plus any DNA in organelles. Nucleic acids are molecules that encode genetic information. They consist of a series...
- Phenotype
Term: phenotypeLiterally meaning: ?visible type?Origin: Anc Greek?????/pheno(=appear, shine, present, show)+?????/typos(=type, shape, appearance) > ?????/typto(=hit, stamp)Coined/HistoryIn 1905 by the Danish botanist Wilhelm Johannsen 1857-1927) who...
- Genetics
Term: genetics Origin: Anc Greek ?????/ genea(=generation) < ?????/geno (=birth to)> ???????/genesis(=origin) Coined: Wiliam Bateson (1861-01926)In an April,1905 letter to fellow scientist Adam Sedgwick at Cambridge in an effort...
Biology
gene
Term : Gene
Origin: Anc Greek ?????/ genea(=generation) < ?????/geno (=birth to)
Coined: Although the notion of a gene was began with Gregor Mendel?s work on pea plants (1866), the term gene was coined by Wilhelm Johannsen (1857 - 1927), a Danish botanist and geneticist, in his translated to German book ? Elemente der exakten Erblichkeitslehre.? In this book Johannsen in 1909 used the term ?gene? in order to describe the fundamental physical and functional units of heredity. This term was coined to describe Mendel's factors of inheritance and it was in opposition to the then common pangene that stemmed from Darwin's theory of pangenesis*. In the 1940s and early 1950s, experiments pointed to DNA as the portion of chromosomes that held genes.*Pangenesis : Charles Darwin?s hypothetical mechanism for hereditary. Aaccording this theory of 1868, gemmules containing hereditary information from every part of the body throws off into the blood and finally they are collected in the reproductive cells in gonads as the units of hereditary transmission. Twenty years later in 1889, De Vries, a Dutch botanist, published his book "Intracellular Pangenesis" in which, based on a modified version of Darwin?s theory, he postulated that different characters have different hereditary carriers and that inheritance of specific traits in organisms comes in particles. He called these units pangenes, a term 20 years later to be shortened to genes by Wilhem Johannsen.
The etymology of the word pangenesesis comes from the Greek word ???/pan(=whole) ???????/genesis (=birth, origin)
Definition
A hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and usually that encodes a specific protein responsible for a particular characteristic in an organism.
Runon derivatives :
Genetics, genomics, genus, genotype
comments:
In 1905 Wilhelm Johannsen coined the terms genotype to describe the genetic constitution of an individual, and phenotype, to describe the visible result of the interaction between genotype and environment.
- Mendelian Genetics Part No. 1 - Defining Key Vocabulary
Solving Mendelian genetics problems can seem somewhat daunting from the onset, especially with the vocabulary that is associated with them. Here we will define key terms that are used in genetics problems, but also, walk you through the proper steps needed...
- Genetic Terms
Genotype is the genetic composition of an organism. Phenotype is the set of characteristic manifested by an organism. An individual has a heterozygous condition if he has 2 different alleles of the same gene An individual has a homozygous condition if...
- Genes Are Dna
Key Terms:The genome is the complete set of sequences in the genetic material of an organism. It includes the sequence of each chromosome plus any DNA in organelles. Nucleic acids are molecules that encode genetic information. They consist of a series...
- Phenotype
Term: phenotypeLiterally meaning: ?visible type?Origin: Anc Greek?????/pheno(=appear, shine, present, show)+?????/typos(=type, shape, appearance) > ?????/typto(=hit, stamp)Coined/HistoryIn 1905 by the Danish botanist Wilhelm Johannsen 1857-1927) who...
- Genetics
Term: genetics Origin: Anc Greek ?????/ genea(=generation) < ?????/geno (=birth to)> ???????/genesis(=origin) Coined: Wiliam Bateson (1861-01926)In an April,1905 letter to fellow scientist Adam Sedgwick at Cambridge in an effort...