I've been wondering about that one for awhile and I didn't think
about the extra "stuff" that may come along with the egg/embryo
from only (mostly) the female parent.
> In the first, most organelles appear to be inherited primarily,
> if not exclusively, from the mother. Many of these organelles
> contain their own DNA, such as chloroplasts and mitochondria.
> Therefore, since the DNA in these organelles comes only from the
> mother, there can be differences depending on which species was
> the mother.
Ok. I suppose then, if someone were to cross, say, N. RAFFlesiana
(lowland) with N. VILLosa (highland), the N.vill * N.raff might
(?should?) enjoy highland conditions more than N.raff * N.vill?
I would think these sort of traits influence metabolism more
than the way the hybrid looks. Am I on the mark here?
> In the second example, DNA can be packaged or chemically
> modified differently in the maternal or paternal gametes. This
> is called imprinting, and at least in mice, can lead to expression
> of only the genes inherited from one parent. In the third example, the
> egg is loaded with proteins and RNAs needed for early development in
> the mother. These maternally provided components can, in principle,
> lead to differences in the organism.
Hmm, these two sort of sound like the same thing, almost... Chemical
modifiers would be proteins... It's just the timing of the effect
that's different, right?
> Hope this answers your question, at least in part.
Oh, yes this very detailed description has answered a number of
of questions. Thanks!
Dave Evans