-
Hello!
Either you have not registered on this site yet, or you are registered but have not logged in. In either case, you will not be able to use the full functionality of this site until you have registered, and then logged in after your registration has been approved.
Registration is FREE, so please register so you can participate instead of remaining a lurker....
Please be certain that the location field is correctly filled out when you register. All registrations that appear to be bogus will be rejected. Which means that if your location field does NOT match the actual location of your registration IP address, then your registration will be rejected.
Sorry about the strictness of this requirement, but it is necessary to block spammers and scammers at the door as much as possible.
locus and allile
- Thread starter hediki
- Start date
Joejr14
Grand Bubble Burster
Locus- Place that a given gene occupies on a chromosome
Allele- one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits; "some alleles are dominant over others.
To answer your question, anerythrism and amelanism are not on the same locus. If they were, I believe you'd get something very weird that looked half in between. I think that only thing this holds true for is for amel and ultra.
Allele- one of two alternate forms of a gene that can have the same locus on homologous chromosomes and are responsible for alternative traits; "some alleles are dominant over others.
To answer your question, anerythrism and amelanism are not on the same locus. If they were, I believe you'd get something very weird that looked half in between. I think that only thing this holds true for is for amel and ultra.
Last edited:
Joejr14 said:
A little fine-tuning:
Definition of locus is acceptable.
I'd change the definition of allele to "one of two OR MORE alternate forms...". Because if amelanistic and anerythristic mutants had the same allele, the wild type allele would make a third allele.
If two recessive mutant genes like the amelanistic mutant gene and the anerythristic mutant gene had the same locus, a heterozygous individual might look amelanistic, or it might look anerythristic, or it might look somewhere in between. All three possibilities have shown up at various loci in other species. The one thing our heterozygous individual would not look like is normal. Crossing amelanistic x anerythristic produces normal babies. This is good evidence that the two mutant genes are not allelic.
The original post defined allele as "one of two alternate forms of a gene ... ". I took that to mean the wild type allele and a mutant allele.
The w locus in the fruit fly has over 100 mutant alleles in addition to the wild type allele. The definition must cover examples like that, too.
The w locus in the fruit fly has over 100 mutant alleles in addition to the wild type allele. The definition must cover examples like that, too.
Certainly one part of the definition of "allele" must include that they occur at the same locus.
The latest wording makes it sound as if "allele" excludes the wild type version of a gene. So I had a look on dictionary.com. Here's the definition that I like best. "Any of the alternative forms of a gene that may occur at a given locus." (Source: Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.) In this definition, there is no upper limit on the number of alleles, wild type is one of the "alternative forms", and all have the same locus.
The latest wording makes it sound as if "allele" excludes the wild type version of a gene. So I had a look on dictionary.com. Here's the definition that I like best. "Any of the alternative forms of a gene that may occur at a given locus." (Source: Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.) In this definition, there is no upper limit on the number of alleles, wild type is one of the "alternative forms", and all have the same locus.
Serpwidgets
New member
Alleles are variations that can be found at a particular locus.
This includes the wild type allele, and any mutant alleles. There is no inherent "THE gene for this locus." One alternative only happens to be called wild type because it's the one we think is most common.
For example, "the alleles that exist at the TYR locus are TYR, Amel, and Ultra." (TYR is the wild type.)
This includes the wild type allele, and any mutant alleles. There is no inherent "THE gene for this locus." One alternative only happens to be called wild type because it's the one we think is most common.
For example, "the alleles that exist at the TYR locus are TYR, Amel, and Ultra." (TYR is the wild type.)