If you cross two parents that that area aa and aa, then self pollinate one of their f1 offspring what is expected genotypic ratio of the f2 population

In your problem, you didn’t put who among the parents have dominant or recessive trait, but if both parents have recessive trait, which you said (aa) and (aa), even if they will self pollinate and even no matter how you cross them, the genotypic ratio would still be aa,aa,aa,aa.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.