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Allolactose is the inducer in the wild-type lac operon, in nature. However, in the experiment IPTG was the inducer. Why is it important that IPTG is not metabolized?
The bacteria are allowed to grow overnight and are streaked on a plate using the technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicill..
A neutral variant of feather color in snow geese, called blue phase is caused through an unknown genetic variant. The less common blue phase results from a single dominant gene while common white phase is homozygous recessive.
Based on human logic, if a parasite kills its host it is also harming itself. Tapeworms then appear to be perfect parasites because they cause very few symptoms in the host.
Jennifer has the stomach flu that is going around campus and has been vomiting profusely for the past twenty-four hours. Not only has she been unable to keep down fluids or food.
Assume that the trihybrid cross MM SS tt X mm ss TT is made in a plant species in which M and S are dominant but there is no dominance between T and t.
A recessive mutant allele, black, causes a very dark body in drosophila when homozygous. The normal wild-type is described as gray. What F1 phenotypic ratio is predicted when a black female is crossed to a gray male whose father was black?
Assume if heritability of male tail length in a bird was known to be 0.5, and female birds impose a selection differential of five cm on male tail length because they are too much attracted to long tails.
You have a culture that contains 2.8 X 10^7 CFU/ml and you want to obtain a plate with approximately 30 colonies on it after spread plating 100 microliters. What dilution would you use?
In the humans, the gene for albinism is recessive to gene for normal skin pigmentation. If two heterozygous persons have children, state the probability they will have a child who is an albino?
Crick, Brenner, and colleagues conducted experiments in 1961 using mutants in the rII locus of the T4 phage. They were able to show that certain mutations could be reversed if they.
Create a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water.
Describe the structure of the utricle and saccule and explain how linear acceleration results in stimulation of the hair cells within these organs.
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