_3. in which of the following organelles is a cell's atp produced?
a. mitochondrion b. endoplasmic reticulum c. golgi ap

Mitochondria.

Explanation:

It's the powerhouse of the cell :) But really, the mitochondria is the main source of power and energy for the cell.

25%

Following a cross between Ttbb and ttBb, the resulting offspring would be:

TtbB , TtbB , Ttbb , Ttbb , ttbB , ttbB , ttbb , ttbb , TtbB , TtbB , Ttbb , Ttbb , ttbB , ttbB , ttbb , ttbb

To have a clearer idea, see the attached image.

Of the 16 possible combinations from this dihybrid cross, there will be:

4 tall plants with blue flowers

4 tall plants with white flowers

4 short plants with blue flowers

4 short plants with white flowers

There are 4 possible genotypic recombinations that would yield short plants with white flowers out of a possible 16, so the chance that the offspring will be short with white flowers would be 4/16 which is 1/4 or 25%