Think about a cross between a male who has vitamin D resistant rickets and a female who has fully functional PHEX protein and does not express vitamin D resistant rickets. Please use the symbol d, to denote the allele with the fully functional gene, and the symbol D, for the […]

What ratio of genotypes and phenotypes will you get if you perform the following cross using dogs. the wild type b+ produces black fur, the recessive b allele produces brown fur. The wild type h+ produces a one headed dog, the recessive h allele produces a two headed dog. the […]

1. It has been hypothesized that, if the sun disappeared, all life would end. Other than the obvious drop in temperature, why would humans probably die if the sun suddenly stopped shining? Outline the flow of energy that takes place ,including energy transformations 2. It takes an input of energy […]

Two genes combine to generate the phenotype of the comb of a rooster. The 4 possible phenotypes are walnut, rose, pea and single. Rose has an absolute requirement for the presence of the dominant allele R and pea has an absolute requirement for the presence of the dominant allele P. […]