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Background:
A geneticist discovers two genes that are involved in the cell cycle of C. elegans, a commonly used model organism. She studied the effects of these mutations in separate worm lines: aab+b+ and a+a+bb. to gain a better understanding of the cell cycle, she needs to create a double mutant line that lacks functional alleles for either gene (aabb). The genome project has discovered tah these two genes are on the same chromosome, 8 map units apart.
Problem:
She crosses the two lines together (aab+b+ x a+a+bb) to create a heterozygote (a+ab+b). Two heterozygotes are crossed together to create an F2 population. What proportion of this population will be true-breeding double mutant?
A rabbit taken from a meadow near sea level and moved to a meadow high on a mountainside would have some trouble breathing. Why give an appropriate reason.
Plants often produce waxes on the surface of their leaves to prevent dehydration and protect against insects. What structural feature of waxes makes them more suitable for this task than carbohydrates or proteins.
In the fruit fly, the wild type purple eye color is produced through a combination of brown xanthommatin and bright-red drosopterin pigments.
Compare and contrast the processes of replication and transcription. Be sure to include in the discussion a comparison of the purpose of the processes, the templates used in each process, when each process occurs, and the initiation and terminatio..
A poll is made of four allozyme loci in a particular population. The alleles are labeled alphabetically according to the mobility of their products in electrophoresis.
All through other periods of time, Tony seems very "down." throughout these times he does not take care of himself. He seems to want to sleep all the time, and he often makes thinly veiled references to wanting to commit suicide.
What is rabies? What animals carry it? What are ways to prevent it? What about the vaccine? Who should get it? answer should be about 200-300 words and should be written clearly.
Tastes that are attractive (sweet and umami) or aversive (bitter) use G-protein coupled receptors, as compared to sour and salty tastes. What are the advantages of G-Protein coupled receptors that might explain this distinction? What attributes of..
What environmental conditions would favor plant species with a strategy of producing many small seeds rather than a few large ones? What classification would we give to species utilizing one of these two strategies? Name and describe each.
what type of evolutionary or ecologicalexperiment(in theory) can i do with red tailed boas (Boa Constrictor constrictor) orany other type snake for that matter? your ideas are greatly appreciated thank you.
Discuss how the barrier function of membranes is utilized in the production of ATP in the electron transport system of mitochondria.
Upon entering graduate school, you heard rumors about a student, who was totally inspired by a "rusty nail experience".
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