Inheritance of Genes
Jysudo:
I am getting a couple of kids which I have been studying them really closely. It appear that they only inherit genes from one parent/ one side of the family. E.g Son with mother's features (he look almost 80% of mother's male version) and grandpa's eyes.
almost nothing I can find from the father's side.
Another female kid is the female version of the dad. Dad is really good looking but a female version of him looks... :-X
Can SimPE help me to check whether the son inherit genes from both sides of family?
I suppose I could just take a look at the DNA. but how about shape of eyes, shape of nose and stuff like that?
This is getting disconcerting for me. I need an answer to this ;)
maxon:
Well, the genetic features (hair, skin tone and eyes) depend on whether the features are dominant or recessive (just like in 'real' genetics - yeh right). Anyway, if you're using CAS sims, they only have one set of genes to pass on. So, if you have a parent with brown hair and a parent with blond, the kids will always have brown hair because brown is dominant - they inherit that gene from one parent and it wins out over the blond one (which they also inherit from their other parent). So, the kids of that couple will always carry a dominant brown gene and a recessive blond gene and will all be brown-haired. Sims have two slots for genes but only express the most dominant. It's when you get into the second generation that things get interesting. At that point, the parent sims (who were the children in the previous generation) can pass on either their dominant or their recessive gene to their children. Depending on what their children get from their other parent, you can end up with blond kids. The parent would have to pass on their recessive blond gene while the other parent would have to pass on a blond gene or a red one (red is most recessive IIRC). So the blond skips a generation but can appear in the grandkids. Sorry, if that's not an appropriate answer. If you have a grasp of genetics, you don't really need me to explain that. Real genetics, of course, is far more complex.
As for the face shapes: nose, chins, mouths, etc., wiith my own sims I've seen a mixture in my offspring. As I understand it, the game blends features of both parents faces together. No features, however, are dominant/recessive like the so-called 'genetic' features so you should see a mix as I do. However, I have seen cases where the face of a child more closely resembles one parent than the other.
Oh, I forgot to add. I usually look at the genetics using the Sims 2 Database programme - no reason really except that I find the layout clear and it shows what genetic material the kids inherit from each parent. I guess you can do it with SimPE too, it's just that I like that.
Jysudo:
Ok thanks but these are not CAS sims (for CAS sims, I know they only have one set of genes to pass on) . These are my 5th generation sims.I understand about the genetics part but not the features part. But thanks for explaining to me anyway :) Its always good to be reminded of how those recessive and dominant genes work :)
But if the game blends the features together, does it mean we cannot tell them apart at all with any program?
oh yes, I prefer to use SimPE to look at DNA simply because I don't want to install another program :P
maxon:
Quote from: Jysudo on 2006 March 16, 02:04:06
Ok thanks but these are not CAS sims (for CAS sims, I know they only have one set of genes to pass on) . These are my 5th generation sims.I understand about the genetics part but not the features part. But thanks for explaining to me anyway :) Its always good to be reminded of how those recessive and dominant genes work :)
The only thing I can suggest then is that you either have custom genetics in the families (always dominant unless you alter them) or have just run into a genetic bottleneck (AKA bad luck) and the parents are only passing on the one eye colour or hair colour.
Quote from: Jysudo on 2006 March 16, 02:04:06
But if the game blends the features together, does it mean we cannot tell them apart at all with any program?
oh yes, I prefer to use SimPE to look at DNA simply because I don't want to install another program :P
Essentially yes, I would guess. I have seen information about (what I take to be) face shapes in SimPE but working out who got what from where is going to be a major fiddle. It's not easily extractable information like the eyes, hair and skin tones.
Regarding the Sims 2 Database, what I like about it, is that it shows the genetic inheritance with a little chart. It shows that Grandma passed on her blue eyes, while Grandad passed on his green and then that child 1 got the blue eyes and child 2 the green and so on. It makes the connections visible which I don't think SimPE does, although the information is there in SimPE readily enough.
Jysudo:
I don't tink I got a genetic bottleneck but its odd. For example, there is the 5th generation sim who inherit a lot of dominant genes from her father while her hubby is a in born sim which I got from some one else (a CAS sim, in other words).
The child inherited dad's recessive blond hair (am i right that black hair is dominant- the mom is black haired?), his lips and shape of eyes (from my close visual observation). At most, she got her mother's nose and that's only a hard guess on my part.
If I look at the hubby in bodyshop or CAS, his child will look like almost the female version of him.
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