Say that I have a child. I'm homozygous for my big eyes which is the dominant trait and my husband is heterozygous for his small eyes. Is it possible for my child to inherit small eyes b/c i did the punnette sqare and it turned out like this. EE,EE,Ee,Ee. E=dominant and e= recessive. Obviously the E took over all so is it still possible though?
2007-04-22 09:14:27 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Biology
No it is not possible. Since you are EE and your husband is Ee he can inherit the recessive gene however, the dominant will show in his physical attributes because it's dominant. He can only have big eyes.
Does that make sense?
2007-04-22 09:19:03 · answer #1 · answered by crengal 2 · 0⤊ 0⤋
I think you are using the words homozygous and heterozygous wrong. Homozygous means both alleles are the same so either PP or pp. Heterozygous means both alleles are different so Pp (if he is recessive he would have to have two of the same alleles so he can not be heterozygous).
I have never heard of big eyes being dominant but even if we assume they are, that person could be Pp or PP (since you only need one dominant). Your husband assuming he is recessive has pp. Thus you could have a pp or Pp.
But you do have to keep in mind that there is more to this then just the punnett square (tho this is a good general rule). Any geneticists will tell you there is more going on then just two genes here. Otherwise parents who both have blue eyes would always have children with blue eyes and this isn't so.
2007-04-22 16:55:57 · answer #2 · answered by gnomes31 5 · 0⤊ 0⤋
The recessive gene would be the one you could be absolutely sure is homozygous. If A dominant gene is determining things, the person with the dominant gene could be Ee or EE. If you are a confirmed EE, (double dominant) then the dominant gene will be present for all your children.
However, human eye size is probably not determined by single gene, but several. So, a simple square plot wouldn't give all the outcomes.
2007-04-22 16:26:06 · answer #3 · answered by coven-m 5 · 0⤊ 0⤋
It shouldn't be possible, but then your husband would have to have big eyes. If he is Ee and E is the dominant gene for big eyes, he would have big eyes. Now, if he has small eyes, he would have to be ee. If you are truely homozygous EE (and if this trait is controlled by a single gene--that might be the biggest IF in this question), then all your kids should have big eyes.
2007-04-22 16:19:15 · answer #4 · answered by hcbiochem 7 · 1⤊ 0⤋
You have the possible genotypes correct. If E is dominant, then no child will have the e phenotype. However, you write that your husband is heterozygous for his small eyes. If e is recessive, then your husband would have to have the ee genotype in order to have small eyes. This does change the genotypes, but none of the kids would have small eyes in that case, either.
2007-04-22 16:21:25 · answer #5 · answered by Nicole B 5 · 0⤊ 0⤋
If you are homozygous dominant (EE) then no it shouldn't be for this trait.....as as you rightly figured out all offspring would carry the E and have large eyes. If its not a straight dominance character then its a maybe (ie like skin, hair colour)
2007-04-22 16:23:05 · answer #6 · answered by mareeclara 7 · 0⤊ 0⤋
My Dad has big eyes-
and I have Big Eyes...but my Mom has small eyes
I never heard that Big Eyes are Dominant--but even if they are---of course your son could have small eyes. Anything "recessive" can still happen. I know a girl who has 2 brown/dark black parents--and she (the daughter) is very, very light-skinned. Recessive Can happen..But I will say that boys tend to always look like their Moms.
Just pray to God for a healthy child.
2007-04-22 16:24:54 · answer #7 · answered by Anonymous · 0⤊ 0⤋
yeah anythings possible becasue my parents both have brown eyes and i have blue eyes so think about that 1 the chances of geting the reecessive 1 are very slim but it happened, friends has got 1 blue eye and 1/2 blue and 1/2 brown eye again the reccessive had taken place, i like studiing genes very interesting
2007-04-22 16:18:59 · answer #8 · answered by skellyskeldon 4 · 0⤊ 1⤋
Yes it is still possible. It's also possible that your child can inherit recessive/dominant genes from your parents or grandparents.
2007-04-22 16:17:48 · answer #9 · answered by ? 6 · 1⤊ 1⤋
yes. if somewhere along tha lines one of your or his parents or grandparents etc had small eyes. also if u do drugs tha square gets all messed up
-Ron
http://ourstupidworld.blogspot.com
2007-04-22 16:18:01 · answer #10 · answered by Angry Gilmore 2 · 0⤊ 1⤋