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Gene

Definition

noun, plural: genes

(cell and molecular biology)

The fundamental, physical, and functional unit of heredity.


Supplement

It is because a gene is a segment of DNA (on a specific site on a chromosome) that is responsible for the physical and inheritable characteristics or phenotype of an organism. It also specifies the structure of a protein, and an RNA molecule.

A gene is formerly called a factor.


Word origin: German Gen, from gen-, begetting, in Greek words (such as genos, race, offspring).
Derived forms: genetic (adjective).
Synonym: factor (obsolete).
See also: DNA, allele, recessive, dominant.


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Please guide me about these restriction enzymes

you must select enzyme that cut your plasmid in one (or two) determined sequense and also not your target gene.

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by hematologym
Mon Mar 17, 2014 11:17 am
 
Forum: General Discussion
Topic: Please guide me about these restriction enzymes
Replies: 2
Views: 173

Help: Confused with primers in a PCR of a vector?

... I am an undergrad being introduced to a lot of different lab techniques, so I'm not entirely familiar with what is going on. We recently ligated a gene into a pBS vector and popped it into some E. coli cells. We looked for positive clones via blue/white screening and isolated/purified the respective ...

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by keetner
Sat Mar 15, 2014 3:21 am
 
Forum: Molecular Biology
Topic: Help: Confused with primers in a PCR of a vector?
Replies: 0
Views: 65

What makes dominant allele dominant?

Yes, it is possible that there are more than two different alleles for a gene. The most popular example, that comes into my mind, is blood types (AB0-system). But it is not possible that more than one is recessive to all the others - what would happen if two ...

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by Tricho
Sun Mar 09, 2014 7:19 pm
 
Forum: Genetics
Topic: What makes dominant allele dominant?
Replies: 5
Views: 1084

Re: Why do Africans have large noses and lips?

I don't know the answer to this specific question, but we do know some things about how genes are linked on DNA. Sometimes a trait that is helpful for survival is very closely associated with another trait on the DNA strand. So when natural selection keeps trait A in ...

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by anneland
Sun Mar 09, 2014 6:54 pm
 
Forum: Human Biology
Topic: Why do Africans have large noses and lips?
Replies: 30
Views: 186225

What makes dominant allele dominant?

Can a gene have e.g. three alleles for three different colors. Which is (are) dominant? Must there be a dominant one? Can all be recessive?

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by kau
Sun Mar 09, 2014 3:47 pm
 
Forum: Genetics
Topic: What makes dominant allele dominant?
Replies: 5
Views: 1084
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