Genetic problems a researcher studying petunia plants. these plants have either red or white and this characteristic is influenced by one gene. the alleles are r red (red is dominant) and r white. she crosses to heterozygous red plant with a homozygous white plant. determine the expected genotypes and phenotypes of the offspring using the steps outlined above.

Well, you would use Punnet squares. Don't forget that heterozygous means that the alleles are different so Rr. Homozygous means that the genotype will have the same genes rr. When you put together the Punnet squares, I always like to determine the percentage of phenotypes possible. In this case 50% of them are going to be white, and 50% of them are going to be red.          

velocity and height

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides