Home Forum Dictionary Articles Tutorials Books Directory Share your work


Edit page | Page history | Printable version

Dictionary » S » Sex-linked

Sex-linked

sex-linked

(Science: genetics) A genetic disorder where the genetic defect is linked to one of the chromosomes that determines sex (x or y). This is usually due to a gene on the unpaired portion of the x chromosome. Recessive X linked alleles are fully expressed in the heterogametic sex because they can have only one copy of the gene. Thus X linked mutant disorders are more common in human males than in females.

An example is haemophilia, which is autosomal recessive and linked to the x chromosome, so only males (xY) actually manifest the disease.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Re: Any SOLID arguments against evolution?

... new information/genes). Sexual reproduction has a good amount of crossover exchange which greatly accelerates the ability to adapt and change. Asexual reproducers such as E. coli produce clones of itself which are identical to the parent. Fast responses to environment is then from exchanging ...

See entire post
by GaryGaulin
Sat May 30, 2009 5:24 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 100
Views: 1608

Re: Any SOLID arguments against evolution?

... for the chromosome fusion. When detailed in a cladogram there are two branching events. First, the fusion in one parent's gamete (haploid sex cell) to produce 47 chromosome offspring with the fusion. That was next replicated in the population. The mother of a 47 might have known there ...

See entire post
by GaryGaulin
Sat May 23, 2009 6:05 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 100
Views: 1608

New Home/Classroom Fruit Fly Speciation Experiment

... new information/genes). Sexual reproduction has a good amount of crossover exchange which greatly accelerates the ability to adapt and change. Asexual reproducers such as E. coli produce clones of itself which are identical to the parent. Fast responses to environment is then from exchanging ...

See entire post
by GaryGaulin
Fri May 15, 2009 1:55 am
 
Forum: Evolution
Topic: New Home/Classroom Fruit Fly Speciation Experiment
Replies: 0
Views: 122

Male eggs and female sperm. Please help!

Same sex reproduction in humans? (are you kidding me here?) As I remember, sperm cells may exist as androsperms or male-bearing sex chromosomes, and the gynesperms bearing the female sex chromosomes. But of course, with the ...

See entire post
by mcar
Thu May 07, 2009 10:12 am
 
Forum: General Discussion
Topic: Male eggs and female sperm. Please help!
Replies: 4
Views: 270

Re: Urine infections

... infections than men. This is probably because women have shorter urethras, so it is easier for the germs to move up to their bladders. Having sex can make it easier for germs to get into your urethra. You may be more likely to get an infection if you do not drink enough fluids, you have diabetes, ...

See entire post
by sanjidcapa
Tue May 05, 2009 9:05 am
 
Forum: Human Biology
Topic: Urine infections
Replies: 17
Views: 1279
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 2,220 times. 
What links here | Related changes | Permanent link