Which of the following is a part of the heliocentric model? all objects in space move around earth in perfect circles. all objects in space move around the sun. all objects in space move in parallel tracks. all objects in space are perfect spheres.

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. a parakeet that is heterozygous for blue feathers (dominant) is crossed with a parakeet that is homozygous for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent