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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?
1. describe the activity of our immune system against the pathogen.2. what types of medical treatments exist? describe
In explaining their findings, the authors have ignored a major threat to the validity of their estimates of exposure. Explain and discuss this error.
What are the proteins and the positions of the sequences they bind involved in transcription of the Lactose operon of Escherichia coli?
The gene for sickle-cell anemia exhibits heterozygote advantage. An individual who is an HB-A/HB-s heterozygote has increased resistance to malaria and therefore has greater fitness than the HB-A/HB-A homozygote, who is susceptivle to malaria, and..
Construct the nuclear genome content of a 2n=4 organism at G1 and at metaphase, showing each chromosome and sister chromatid as a single vertical line.
What is an animal? Include in your answer how animals are differentiated from other life forms. In particular, describe the similarities and differences between volvocine protozoa, members of the Phylum Porifera, and members of the Phylum Cnidaria th..
calculate the percent recovery for the analysis of a spike. the sample was spiked with 5.00 ml of a 200.0 mg/l solution. the sample matrix concentration was determined to be 30.0 mg/L. The sample matrix volume (excluding the spike) was 90.00 ml. T..
If an enzyme with no inhibitor has a Vmax of .091 abs/min and a Km of .31 mM. An inhibitor is added (1 uM) which changes the Vmax to .036 abs/min and a Km of .13 mM, so it has a Ki of -1.72 and a Ki' of .65 uM.
Explain the subdivisions and the sub-subdivisions of the ventral cavity and name an organ found in each.
Did any of the mutant plants show a variance in phenotypes from the wild-type plants under one of the experimental conditions? Explain your answer.
Who is most likely to find it useful to use group designations such as "American Black" and "American White"?
Suppose that the each replication fork moves at a rate of 500 base pairs per second, how long would it take to replicate the E. coli chromosome from a single origin of replication?
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