Is it possible to know the genotypes of the three children in generation III?

"do a testcross with a homozygous recessive plant."

not sure if this is what you'r looking for nnew= nold

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.