Login

Join for Free!
118875 members


allele or gene?????

Genetics as it applies to evolution, molecular biology, and medical aspects.

Moderator: BioTeam

allele or gene?????

Postby kiran » Fri Oct 07, 2005 8:20 am

:?: Can someone tell me the basic difference betn allele and gene??? huh.
:arrow: Actually why is neurospora widely used in genetic study?
:arrow: What restriction endonuclease enzyme was used in preparing bacteria capable of producing insulin?
:lol: shall be glad to have the answers.
tell me........
User avatar
kiran
Garter
Garter
 
Posts: 36
Joined: Sun Jun 26, 2005 8:08 am
Location: NEPAL

Re: allele or gene?????

Postby microbe hunter » Sat Oct 08, 2005 4:23 am

kiran wrote::?: Can someone tell me the basic difference betn allele and gene??? huh.
:arrow: Actually why is neurospora widely used in genetic study?
:arrow: What restriction endonuclease enzyme was used in preparing bacteria capable of producing insulin?
:lol: shall be glad to have the answers.


gene is sumthin which determines a character.
an allele is a set of two contrasting characters specified by a gene.ie take tall and dwarf characters......it wil be coded by two genes and they are alleles of a character ie height.
User avatar
microbe hunter
Garter
Garter
 
Posts: 16
Joined: Sat Oct 01, 2005 4:27 am

Postby Ellie » Sat Oct 08, 2005 8:56 am

A gene is the set of instructions that code for a particular characteristic

An allele is the two alternative/similar variations of a gene that determine how the gene is expressed

A normal allele is the wildtype allele and the other variant is the mutant allele
Ellie
Garter
Garter
 
Posts: 2
Joined: Sat Oct 08, 2005 8:28 am
Location: Adelaide (unknown capital city is Australia)


Re: allele or gene?????

Postby kiran » Sat Oct 08, 2005 10:50 am

microbe hunter wrote:
kiran wrote::?: Can someone tell me the basic difference betn allele and gene??? huh.
:arrow: Actually why is neurospora widely used in genetic study?
:arrow: What restriction endonuclease enzyme was used in preparing bacteria capable of producing insulin?
:lol: shall be glad to have the answers.


gene is sumthin which determines a character.
an allele is a set of two contrasting characters specified by a gene.ie take tall and dwarf characters......it wil be coded by two genes and they are alleles of a character ie height.


fine but I want to know what is the basic difference between a gene and a allele. I find iin some books that code like TT or tt aren sometime called gene and sometime allele? Is it the same ? OR it is different as per cases of being haploid or diploid? And what about my other questions??
tell me........
User avatar
kiran
Garter
Garter
 
Posts: 36
Joined: Sun Jun 26, 2005 8:08 am
Location: NEPAL

Re: allele or gene?????

Postby canalon » Sat Oct 08, 2005 5:39 pm

kiran wrote:fine but I want to know what is the basic difference between a gene and a allele. I find iin some books that code like TT or tt aren sometime called gene and sometime allele? Is it the same ? OR it is different as per cases of being haploid or diploid? And what about my other questions??


OK

A gene is a string of nucleotides coding for a particular protein. Due to mutation there could be many slightly different sequences coding for the same protein, which can result in different phenotypes.

When we talk about a gene, we talk about the group of all possible sequences (in different individuals) that code for the particular protein, and each of the different version will be considered an allele of this gene. The most commonly found allele is usually refered as the wild type and its name is in capital (T in your example), and less common alleles would be refered in small letters (t or if more than 2 alleles t*, t1 etc..)
So TT would be a hozygote for the wild type allele of the gene T, tt would an homozygote for the mutatnt allele of the same gene, and Tt would be heterozygote.

Is it clearer?

Patrick
User avatar
canalon
Inland Taipan
Inland Taipan
 
Posts: 3909
Joined: Thu Feb 03, 2005 2:46 pm
Location: Canada

Postby picatooakal » Thu Oct 04, 2012 4:06 am

I've read things about alleles and genes, please correct me if my understanding is wrong, Thank you!

To differentiate alleles from genes, let's give a simpler example: For example, you wish to design a website, and to be able to design a website, you will be needing the CODES that will be encoded in a notepad. After designing a website, you can now show it to the public by registering your website, which will now allow the people to view your website using the internet. The WEBSITE represents the GENE, it is the one that people can see, but they do not know how did it became like that, that is because of the CODES which will represent the ALLELES.
picatooakal
Garter
Garter
 
Posts: 1
Joined: Thu Oct 04, 2012 3:42 am

Postby JackBean » Thu Oct 04, 2012 6:50 am

Not really. If something, than the code in general is the gene, while it's concrete version (what language is it in, what you have in there etc.) is the allele.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Re:

Postby wbla3335 » Thu Oct 04, 2012 6:54 am

picatooakal wrote:please correct me if my understanding is wrong

OK. An allele is a version of a gene. Diploids that have two identical versions are homozygous. Diploids that have two different versions are heterozygous. A diploid individual can have a maximum of two alleles of a gene, one from the mother and one from the father. Within a population, though, a gene can have many, many alleles.
wbla3335
Coral
Coral
 
Posts: 227
Joined: Thu Aug 17, 2006 7:20 am


Return to Genetics

Who is online

Users browsing this forum: No registered users and 1 guest