Please explain how a punit square works, I have a major test on it and im confused

The image is attached but it might be hard to understand because it's hard to explain

One letter from each parent are combined to create a genotype of one possible offspring. Example: G (from one parent) + g (from the other parent) = Gg (genotype of offspring)

Capital letters are dominant and lowercase letters are recessive

Dominant traits mask recessive ones so when the genotype of the offspring is Gg, it will be green because green is dominant over yellow

If you need any help with the questions on the test you can post them and i'll help

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .