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). mc022-1.jpg mc022-2.jpg according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers?

A punnett square is a tabular summary of the possible combinations of the paternal and maternal alleles and thus predicting the genotypes of the organisms in a breeding experiment.

A parakeet that is heterozygous dominant with blue feathers can be represented by the genotype Bb. A parakeet that is homozygous recessive with white feathers can be represented by the genotype bb. When a cross is made between these two, the percentage of offspring predicted to have blue feathers is 50%. It can be represented below-

Phenotype -     Blue feathers    x     White feathers

Genotype  -          Bb                 x               bb

Punnett square                 B                          b

                         b              Bb                        bb

                         b              Bb                        bb

Thus, the percentage of offspring with blue feathers is 50% with a genotype Bb.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.