Can recessive genes become dominant? why?

Question

Can recessive genes become dominant? why?

Answer 1

yes because of mutant happen for example one species  of insects had small wing gene but it was recessive but after one mutant it change to dominant gen and now it is dominant gene .

Answer 2

not really. in natural selection, if a recessive trait is better adapted to the enviroment it is selected for. so the number of individual with the recessive trait increases but i don't think it becomes dominant no matter how many have the recessive trait.

Answer 3

NO

the following should explain why

Both Dominant and Recessive alleles are (usually) ALWAYS TRANSCRIBED, and later Translated into protein. Unless there is genetic imprinting!

Alleles are simply called Dominant or Recessive DO TO THE FACT that when they are both TRANSCRIBED in the SAME organism (Heterozygous) ONE allele PRODUCES A Dominant Phenotype over the other.. But they both are making RNA and protein.

Answer 4

You are misinterpreting what recessive and dominant mean.  The dominant gene is typically one that makes a protein that is fully functional in producing its product.  So the recessive gene can be the trait that one inherits it's just less common than the dominant one being inherited

Answer 5

A dominant gene can be driven out of the population - if as an example, a dominant gene, when expressed becomes lethal - either because it does something bad to the organism, or it does not protect against some widespread disease, the dominant gene can disappear from the gene pool - dark skin is an example when in northern climes - darker skin needs more sunlight to build vitamin D - without that, women suffer miscarriages because of neural tube defects - this gradually lightens the population even though dark skin is a dominant gene.  Similarly, type A blood conveys some immunity to black death - type O does not - a population that has been through bubonic plague has a much higher incidence of type A blood, even though type O is dominant.... Other than a mutation changing the recessive gene, that is how recessive genes can win over several generations...

Answer 6

Recessive and Dominant are relative terms - and it's *alleles* that are dominant or recessive, not genes.

So there might be a gene with three alleles - we'll call them A, B, and C.

A might be dominant to B and C, and B dominant to C but recessive to A.

So the B allele is both dominant *and* recessive.

But the B allele cannot become dominant to A - it will always be recessive.

The only way something like this *might* happen would be a mutation causing a new allele (maybe "X") which has the same phenotype as B, but which is dominant to A.