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Explain differences between complex and chemically defined media, between selective and differential media.
In which organisms do you expect a transposon could be more easily spread despite imposing a small fitness cost on its host: in an asexual haploid species, or in a sexual diploid species? Explain.
Compare the recipes of nutrient agar and HE agar. If an organism can grow on both media, on which would you expect it to grow better? Why?
Describe the cohesion tension theory that enables water and dissolved minerals to be transported through dicot plants. You should also describe how water and dissolved minerals enter dicot plant roots.
If a disease is co-inherited with a certain allele of a genetic marker in a pedigree, what does this suggest about the location of the disease gene with respect to the marker?
An individual heterozygous for 4-gene pairs AaBbCcDd was testcrossed to aabbccdd , and progeny were classified as follows,
Suppose that a molecular clock has been operating since the divergence of two species, calculate the divergence rate, given that the amino acid difference is 20 percent.
Luisa is swinging on a playground swing at school. A teacher facing her blows a whistle to let the children know recess is over. As Luisa swings, what does she hear? When does she hear the highest pitch?
Spiny species of diatoms are found in both warm subtropical waters and colder areas. Because warm water is less dense than cold water, would you predict any differences between the spines of warm-water and cold-water individuals? Why?
The question is to detemine whether B-galactosidase is expressed under specified situations. The answer indictes that the B-galactosidase is expressed whether lactose is present or not.
In hamsters, black coat color (B) is dominant to white coatcolor (b). A homozygous black hamster is mated with aheterozygous black hamster. What will be the possiblegenotypes and phenotypes of their offspring?
The use of PCR and genetic approaches in biotechnology
In flies, a new mutant male is found with short stubbly bristles instead of normal long bristles. The mutant is mated to a normal female.
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