Which of the following best descrites an example of how genetic codes of organisms have been used to help hierarchically classity living things? A) The common nucleic acid sequences of polar bears and black bears can be
deduced from their classification in the same genus, Ursus. (WRONG)
B) Viruses contain DNA which is used to classity which hosts they will
infect into a Linnacan taxonomy of viruses.
C) Since kangaroos and opossums both have developed pouches to carry their young, it proves that they share DNA sequences and belong to the same
D) Even though Eubacteria and Archaebacteria look similar, differences in their ribosomal RNA led to their classification into different domains,

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)

Awire-hair terrier and a smooth-hair terrier are mated. the offspring produced are 6 wire-hair puppies and 2 smooth-hair puppies. a. what pattern of inheritance best describes this situation? b. what is the genotype(s) of the wire-haired puppies? of the smooth-haired puppies? c. what would be the expected genotype and phenotype ratios of a mating between 2 wire-haired terriers that are heterozygous?

Explain how organisms could be harmed by high levels of salt from roadways?