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8. Should we use blind (unknown to the examiner) tests to evaluate the accuracy of a scientist? Please explain your answer.9. Assume you found your sibling's brother-in-law has had a sample submitted to the lab. This is a person you have never met, but that you know has been in trouble with the law. What do you do? 10. Case Study Two: Crime scene evidence suggests one unknown suspect raped and killed (gunshot to chest) the female victim. When the crime occurred 25 years ago, sperm cells were identified in the SAEC kit. No DNA profile was obtained. The case is re-submitted and the remaining vaginal swabs are packaged in a plastic screw-top tube. The swabs appear brown-green in color, but do have a weak AP reaction. The half-life of AP is 12 years, so you expect a weak reaction if you get any reaction. Current DNA efforts provide 3 alleles out of 15. CODIS requires 10 alleles for searching purposes, so you need more evidence. A. Is it reasonable to swab the interior of the tube in the area in which the swabs made contact? Explain. B. AP from pantyhose is negative, but random sperm searches of alternative light source positives reveal low levels of sperm cells. Knowing the victim was a prostitute; would any DNA profile from the pantyhose be entered into CODIS? Why? C. Is it a good idea to wait for newer technology to arrive and re-test your items at that time? Explain
Suppose that in rats, grey fur (T) is dominant to tan (t). If you mate a tan rat with a homozygous dominant rat, Determine what fraction of the offspring will be homozygous?
A seven cm potato sliced is placed into an unknown solution. After the slice is immersed for one hour, the potato slice now measures six cm.
What would occur to the preferred habitat of your plant (Red Maple) in case of partial water drainage of the Mer bleue marsh (such as the water level would go down half the depth of the marsh).
Recognize and discuss three problems faced by conservation biologists working with small populations that are separated from each other in fragmented habitats.
What methods would be used to determine the arrangement of atoms within a protein? This method has also been used to detect and locate the spatial arrangement of the atoms of DNA.
How could you demonstrate experimentally that the selective antagonist binds the receptor specifically? Illustrate the experiment you would perform and also the controls you would contain.
Determine when an organism incorporates genetic material from another orgainism that is not its parent, this is know as
In a series of experiments, genes that code for mutant forms of a receptor tyrosine kinase are introduced into cells. The cells also express their own normal form of the receptor from their normal gene.
Do you think that using recombinant DNA technologies to change the genetic composition of human egg cell is ever justified? If so, what restrictions have to be placed on such a use.
Eukaryotic cells may divide through the process of mitosis or meiosis. In humans, mitosis generates new cells for growth and repair.
There is a population of 100 frogs. Twenty are heterozygotes, 30 are homozygous recessive, 25 are homozygous dominate. What is the frequency of the dominate allele?
find if the individual had been exposed to this disease.
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