Re: Do I really inherit half my genes from both parents?


Ron O wrote:
wiseman wrote:
If I look at people I know, they seem to take after one parent or the
other, not both. Is there an explanattion for this. For example, if one
parent is ugly and smart and the other is good looking and dumb, the
children seem to be either ugly/smart or goodlooking/dumb.

Are there some simple rules about genetics that layperson can
understand?

No, unless he is, like me, interested in learning the ins and outs of
inheritance.
And I still can't, assuming anyone can.



I would like to use genetics to select a mate that will
give me children with the best traits. I dont believe in tossing the
dice on something so important if it is not necessary.

In the past decade things have gotten a little more complicated than
genetics used to be. Before I could just tell you that if you are a
male you inherited less from your father than you did from your mother
by the number of genes on the X sex chromosome that do not balance
against the few that you inherited on the Y sex chromosome that none of
your sisters got. The rest of what you were would have been attributed
to gene interaction (epistasis) and dominance.

Now we have to consider imprinting where certain genes are turned off
in one sex or the other and so are not expressed in the progeny.

You do inherit about half your DNA from each parent, but we now have to
also consider how that DNA is regulated based on where it came from.

Ron Okimoto

And there are the little matters of recombination, dominance and
recessiveness, the effect of copy number variations, non-coding genes,
and probably a good many things I know nothing about.
And reading wiseman's posts, I get the impression that he doesn't
regard such learning as worth while, or even that it might be wise to
start by defining what he means by "smart'.
REgards
John GW


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