Jump to content

Recommended Posts

infected???

 

Usually infections aren't spread through the genome.. I suppose viruses could be in special cases.

 

Though, I think you are just wording your question incorrectly. Figure out what you mean by "infected" and get back to us.

Link to post
Share on other sites

Image two alleles (versions of a gene). One gives the disease, we'll call it "a", and one is normal, we'll call it "A". Very often, a disease will be recessive, meaning you have to get 2 copies of "a" to get it.

 

So, if both parents carry only one copy (genotype Aa);

 

There's a 50% chance for their children to be also carriers; Aa

25% change of getting the 2 normal alleles; AA

25% change of getting the disease; aa

Link to post
Share on other sites
i thought that the diseases were the dominant ones?

It depends on the disease. You can't make a blanket statement like that.

 

If diseases were always dominant, it would probably be an allele that gets eliminated from the population very quickly. But, then, there are exceptions to every "rule."

Link to post
Share on other sites

yea sorry, i just started learning this in bio class, need some info to learn more about genotypes and Mendel's experiments.

 

EDIT: so it is possible that the parents do not have the disease, but their children will get it? like a recessive recessive?

Link to post
Share on other sites
so it is possible that the parents do not have the disease, but their children will get it? like a recessive recessive?

IIRC something like that would be possible if the genotype of parents is heterozygote. Suppose that a certain disease is shown up only with to recessive alleles (aa) . So if the parents are both Aa after combining them we'd get

 

(p) Aa Aa

(f) AA Aa aA aa

 

 

but remember that this is only the dominant-recessive type

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.