When you cross two plants, is the offspring's phenotype a 50/50 mix of both parents?

I know in the f2 and folowing generations the heterozygous traits start to appear which breeders can select and self or back cross to the parents... but what exactly does an f1 hybrid look like?

Is it simply just 50% from each parent?

-I.E. 15% CBD strain crossed with 15% thc will produce 50/50 thc/cbd ratio of around 7.5% thc and cbd?
-I.E. a short indica strain crossed with a tall sativa strain will produce a plant medium size?
-I.E. a ducksfoot plant crossed with normal leaf plant will produce something in between the two leaf morphologies?

mrblackberrycrush said:

I know in the f2 and folowing generations the heterozygous traits start to appear which breeders can select and self or back cross to the parents... but what exactly does an f1 hybrid look like?

Is it simply just 50% from each parent?

-I.E. 15% CBD strain crossed with 15% thc will produce 50/50 thc/cbd ratio of around 7.5% thc and cbd?
-I.E. a short indica strain crossed with a tall sativa strain will produce a plant medium size?
-I.E. a ducksfoot plant crossed with normal leaf plant will produce something in between the two leaf morphologies?

Click to expand...

I am not an expert in these matters but from what I understand, your assumptions would be true if both parents are stablized IBL strains. Also you are never going to get exactly a 50/50 split just like 2 human parents will never have all their offspring be identical. Thats what the different phenos represent.

However if you are just pollen chucking yourself and using hybrids or polyhybrids, you could get lots of variations. It would take a couple years of breeding to take them to say F4 to stabilize or bx them to one or both of the parents. This is where I gdt lost a bit bc Ive never done any breeding myself to speak on why you would do one or the other. Either way to get a perfect 50/50 is going to take a lot of time and testing to dial it in I think.

For any cross, The genotype is 50/50. Half from each parent.
You can not accurately predict the phenotype without some information about other crosses made with the same parents.
phenotype = what the organism looks like
genotype = what's under the hood

The only cross I made (white strawberry skunk X hurkle cbd) turned out pretty good, but I only get like 1 or 2 phenos at most. I crossed male and female, not feminized. I wanted the white skunk taste and the hurkle mild high, I got the hurkle effect but also the taste, never got something similar to the white strawberry. I think the hurkle was the dominant pheno, it would be impossible to determine the offspring based on numbers.