00:01
Looking at carnations.
00:02
So, capital r is for red pigment, little r for no pigment.
00:07
So rr is red, this is no pigment, and the heterozygot is pig.
00:17
So is this an example of epithesis, incomplete dominance, codominance, or pleotropy? so i'll start by ruling out a and d, because these are things that involve, if it's a, multiple genes, and for d, multiple traits.
00:35
So epistasis is where one gene affects the expression of another.
00:44
But we're only looking at one gene here, so we don't have to worry about that.
00:48
D is where one gene affects multiple traits.
00:54
But we're only looking at one trait, flower color.
00:56
So we don't have to worry about that.
01:00
So incomplete dominance and co -dominants.
01:02
These are a whole bit difficult, but you can mix them up.
01:06
The difference is that incomplete dominance, the heterozygote has an intermediate phenotype...