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1. Cystic fibrosis is the most common serious genetic disease in the USA. If the frequency, q, of the recessive cystic fibrosis allele, c, in the USA is 0.04, what is the frequency of people with cystic fibrosis? Remember that if C is the normal allele with a frequency p, then p + q = 1 and and the frequencies of the homozygous dominant, heterozygous and homozygous recessive genotypes are p2, 2pq and q2 respectively.2. Explain the difference between homologous and analogous structures in animals or plants and describe what each tells us about the relatedness of the species involved.3. Explain how the impact of a large meteor or asteroid colliding with the earth could have caused the Cretaceous extinction 65 million years ago. What is the evidence for such a collision?4. Describe the four stages in the in the four stage hypothesis for the origin of life. Why is RNA a likely candidate for the original self-replicating molecule?
A population of T cells has been stimulated to proliferate in response to a particular antigen. A sample of 1000 cells is examined microscopically, revealing that 200 of these cells are in the various stages of mitosis.
Red blood corpuscles do not have a nucleus, but they are eukaryotic cells. Discuss the possible reasons as to why they lack a nucleus and the merits and demerits of this adaptation.
Calculate the separation between the lenses and the magnifying power of the microscope?
Which of the following reactions yields the most new ATP molecules under aerobic conditions?
q. consider a proposal recommending an implementation of a new system affecting multiple departments as in a new
please answer the following in complete sentence and shortbrief response.
You are boiling water on the stove and reach over to turn the burner off. In doing so, your arm brushes against the hot kettle and your skin gets burned. You feel the pain and pull your arm back with a loud exclamation. what parts of the brain and..
The "Primordial soup" includes the mixture of elements and gases which are thought to have started life on the Earth. Specify where did the gases and elements come from?
q. infrequent additional pair paternity despite demonstrable extra-pair matings do males exerts higher level control of
Give one example of humans evolving over the past 10,000 years. Explain why and how evolution is take place?
What specialized features of the skin, lungs, and intestine act as barriers to microbial attack?
the original concentration in a sample is 2.79*10^6 CFU/ml. which sample volume should yield a countable plate? (express your answer as 10^x mL.)
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