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The bacteriophage T4 genome contains about 50 percent A:T base pairs and 50 percent G:C base pairs.
The base analog 2-aminopurine induces A:T -> G:C and G:C -> A:T base-pair substitutions by undergoing tautomeric shifts.
Hydroxylamine is a mutagenic chemical that reacts specifically with cytosine and induces only G:C -> A:T substitutions.
If a large number of independent mutations were produced in bacteriophage T4 by treatment with 2-aminopurine, what percentage of these mutations should you expect to be induced to mutate back to the wild-type genotype by treatment with hydroxylamine?
Some genes that are expressed in the fetal stage are neverexpressed in the individuals life. What do you think is the mostcommon mechanism for preventing the expression of such genes?
Deduce the inheritance of these phenotypes; use clearly defined genetic symbols of your own invention. State the genotypes of all 3 generations and the genotypic proportions of the F1 and F2.
If you cross two dihybrid guinea pigs, ie B/b; SP/sp, what is the expected genotypic and phenotypic ratio of the offspring.
Describe the substrates/products that link the light reactions of photosynthesis to the Calvin cycle.
List the manifestations associated with adrenal medulla hyperfunction and explain how the alterations to normal physiology related to this disorder can cause them.
In about 2 pages, please discuss: Who was Henrietta Lacks? Why is she significant? What was 'special' about her cells? What is the moral controvery all about? What were some of the advancements made?
Choose a species of animal which is threatened or endangered, either due to habitat loss or exploitation (or both), that interests you. Name of the animal (common and scientific name) and Where it is found in the world
Why do you think it is an advantage for pigs to have long uterine horns and a small uterine body, and not the opposite?
How do you predict the offspring when testing for onetrait? Two traits? What is a classic Mendelian ratio? What is incomplete dominance? What are some examples oftraits with incomplete dominance?
Cellular respiration occurs in both plants and animals cells while photosynthesis only occurs in plant cells. How are plants and animals connected via these two processes? Be sure to include balanced chemical equations as part of your answer.
Define macroevolution, coevolution, convergent evolution and mosaic evolution. Why is adaptation so important to evolution?
What does the name 'protozoa' mean? To which subgroup is this name typically attached by scientist.
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