Using the Punnett squares, determine the possible blood types of the offspring and the ratio of phenotypes when:
a) Father is type O, and mother is type AB.
b) Father is type A, heterozygous, and mother is type B heterozygous.
c) Father is type B, homozygous, and mother is type A, homozygous.
d) Father is type AB, and mother is type AB.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point