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Imagine you do a test cross between a purple-flowered pea plant having serrated leaves (a dominant trait) and a white-flowered pea plant having smooth edges. If the purple-flowered plant is heterozygous for both traits, the expected ratio in the offspring is 1 purple-serrated: 1 purple-smooth:1 white-serrated:1 white-smooth. Instead, you see 4 purple-serrated:1 purple-smooth:1 white-serrated:4 white-smooth. What is the explanation of this ratio?
Water is most dense and therefore heavier at 4 degrees Centigrade. At zero degrees Centigrade ice forms and can float on liquid water. Assume ice were most dense at zero degrees Centigrade. Select the best explanation of what would happen in aquatic ..
What is the chemical composition of cell wall in bacteria?What is the function of a cell wall in bacteria?
A scientist discovers a DNA-based test for the allele of a particular gene. This and only this allele, if homozygous, produces an effect that results in death at or about the time of birth. Of the following, which is the best use of this discovery..
how many possible fragments can be presented via MHC class I and/or II from these specific examples and in general for all oligoglycosyceramides? Explain your answer.
A swarm of insects blows out to sea in a storm. They arrive at a tiny island and form a new population. After many generations, they have diverged from the source population on the mainland.
Explain to me the process of plant germination
At another locus, sepia eyes are inherited as an autosomal (non sex linked) recessive. The presence of the white eye phenotype (x superscript w x superscript w in females, x superscript y in males) masks sepia phenotype, so regardless of the sepia ge..
RNAse is an enzyme that cleaves the P--O^5' bond in RNA. it has two His residues in the active site. Suggest a plausible explanation why the enzyme activity changes when pH is increased or decreased from ~pH 6.0.
Meiosis explains Mendel's laws. Explain the phenotype of a mutant in the cell cycle that would disrupt Mendel's first law
What does it mean that catabolism is convergent, and anabolism is divergent? Usespecific examples. Given that slow-twitch muscletends to be used in aerobic efforts, while fast-twitch muscle tendsto be used in sprints, which would you expect to stor..
Discuss the common role the Sonic Hedgehog gene serves in the limb development of all living vertebrates. What does the result of the skate embryo experiment mean about the evolutionary origin of Sonic Hedgehog?
Key Evidence supporting an endosymbiotic origin of mitochondria and plastids: Similarities in inner membrane structures and functions (what does this mean?!)
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