The homozygous yellow seeds will be represented by AA and homozygous white plant will be bb (Therefore green seeds will be a and purple flowers B). So using a punnet square, the cross would be AAbb x AaBb
ATP A ADP + P + energy here's what it looks like chemically, Each phosphate is a Po4( oxygen has a charge of -2 and there are 4 of them, for a total of - 8 and P has a charge of +5, so the net charge of the phosphate group is -3 if free H atom, which are +1, get added to the 0 atoms that aren't bonded to two things then the net charge is zero.)
