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Q1. Conjunction mapping could be used to locate genes on a bacterial chromosome. In this example, F+ strain is able to synthesize methionine, valine, leucine, and histidine. The F- strain is unable to synthesize these amino acids; therefore, they should be supplied in the growth medium. Use the results from replica-plating to answer the questions.
1. On which media, if any, must the F+ be able to grow? The F-?
2. Recognize the prototrophs and auxotrophs. How can you advise?
3. Can you map the chromosome of this species? What further information do you need?
Q2. The seeds of orchids are among the smallest known, with virtually no endosperm and with miniscule seed leaves. As a result, what must one expect to be true of such seeds?
Upon completion of genome sequencing projects, how do scientists usually go about asking how many genes there are in genome and where they are located.
The mitochondria in them have a protein called thermogenin, which allows the flow of hydrogen ions through an inner mitochondrial membrane (bypassing the ATP synthase). Based on this and your understanding of cellular respiration, propose a mechanism..
Darwin understood how natural selection works in the presence of a population with many variant types. What does that variation consist of? How does variation arise? How does it spread during the population.
What are the underlying mechanisms that help assist a species to originate using sympatric speciation although they are not reproductively isolated like in allopatric speciation.Diversity within species that is using sympatric speciation.
What must a biologist do if she or he finds that different methods of analyzing the same data give different estimates of the relationships among certain taxa.
Trace the pathway this particle would probably take while moving from outside the cell to inside. What organelles will it pass through? Where will it be located within these organelles.
Why may selfing be selected for in nature yet still be an ‘evolutionary dead end'. How many kilocalories must Janine eat each day to maintain her present body weight.
Explain this dosage strategy in terms of the negative feedback control of cortisol secretion and receptor function in hormonal pathways.
sketch the chromosomes of the parents and the F1. analyse interference and say what you think of its significance.
Assuming that genotype essential to produce flat tails is homozygous recessive (such as bb) compute the frequency of the b allele in the squirrel population to two decimal places.
Which virus caused it? Why was the viral culture completed after the Gram and acid-fast stain results were obtained.
What disorder does this man have? Gastric secretions normally include about 10mmole/L potassium. How do you account for the low serum potassium in this patient.
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