Why are gene mutations more common in recessive genes than dominant genes?

Answer 1

Because dominant mutations will be selected against. Keep in mind for all dominant mutations, a phenotype will be expressed, and in a lot of these cases, the gene may not be passed on because the affected person may not be able to reproduce (or will be dead before he/she can reproduce).

Recessive mutations can be carried without expressing a phenotype, so unless both alleles are mutated, no phenotype will be expressed.

Answer 2

If the gene mutation was dominant, then the characteristic would be expressed. If that expressed mutation was beneficial, then it would have a better chance of being passed on. In that case, the mutation would eventually be a new characteristic and not a mutation. If the expressed mutation was not beneficial, then it would most likely fail to be passed on.

Answer 3

it surely relies upon on how worry-free that gene is contained in the inhabitants's gene pool. do not assume that each and every one alleles (kinds of a gene) are both worry-free. imagine about a huge bowl of checkers. If the bowl has a good form of black checkers and pink checkers, then i'd assume to drag out a black and a pink about 0.5 of the time. ok, now enable's say that the black checker represents a dominant allele. If I pull out a black and a pink, then the guy would have the dominant phenotype. What if the bowl has 2 black checkers and a couple of hundred pink checkers. inspite of the actuality that if the black checkers are dominant, i does no longer assume to get a black checker when I randomly draw 2 checkers from the bowl. they purely are not that worry-free contained in the bowl. they are uncommon. contained when it comes to human blood form, form O is maximum elementary, even although O is recessive to both A and B. Why such fairly some form Os? imagine a huge bowl of magnetic letters like you stick on the refrigerator. plenty and various of the letters are Os. way fewer of the letters are As and Bs. Now close your eyes and draw out 2 letters. What are the possibilities that you took OO? quite in all probability because fairly some the letters are Os. What are the possibilities that you took AO or BO? nevertheless quite reliable. yet what are the possibilities that you drew AB, AA, or BB. a lot less in all probability because fairly some the letters are Os. So widow's height is dominant, yet no longer many human beings have it. In my bio preparation, I in various of circumstances have about 4 to 6 those with widow's height in a classification of 30 students.

Answer 4

At a guess, I'd say because the result of the mutation isn't expressed as often, and since mutations are more often harmful than helpful, the less often it's expressed, the more likely the bearer will survive and reproduce.

That's just my thoughts though; I didn't look it up or anything.