What are the genotypes and phenotypes of the parents of ff and ff?

F = free

f = attached

Make a punnett square.

         F                F

F        FF              FF

f         Ff               Ff

So the genotypes are 50% FF and 50% Ff.

The phenotype is 100% free since Ff is heterozygous and the dominant trait is present.

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.