Mutations can affect hormone receptors in the following ways, except for which statement?
A. Result in missing or defective receptors
B. Alter the rate of production of receptors
C. Affect the response to a hormone
D. Decrease the level of hormones in their vicinity
E. Alter the binding site of receptors
Answer: D
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Which of the following statements is NOT TRUE about sister chromatids?
a. Sister chromatids separate from one another during prometaphase b. Two sister chromatids make up one chromosome c. Sister chromatids are generated during S phase d. Sister chromatids are physically attached by the centromere e. Sister chromatids normally end up in separate daughter cells
In a GWAS experiment, 500,000 SNPs across the genome are genotyped in thousands of Case and Control individuals. Which statistical analysis should be applied and why?
A) A chi-square test for goodness of fit will test the null hypothesis that the distribution of each SNP allele is the same in Cases and Controls. B) A chi-square test for goodness of fit can be used because this is a small number of SNPs. C) A chi-square test for independence should be used to test the null hypothesis that the distribution of each SNP allele is the same in Cases and Controls. D) A chi-square test for independence should be used to test the null hypothesis that each SNP is linked to a QTL.
In the late 1920s, a mutation occurred in many silver
fox farms around the world. The fox farms that sold expensive furs were proud of the quality of their furs, and each advertised that it had the best, purest breed of all the fox farms. The new mutations produced a “platinum” coat pattern that was commercially desirable, so the farms crossed them to get more. The results of their breeding experiments were as follows: (1) silver x silver >>> all silver offspring; (2) silver x platinum >>> equal numbers of silver and platinum; (3) platinum x platinum >>> two platinum for each silver offspring. Explain. What will be an ideal response?
Maggie was told she has a positive titer to measles. Which of the following could explain this?
A.) She was vaccinated against measles. B.) She had measles sometime in her life. C.) She has measles now. D.) The test was a false positive. E.) All of these choices are correct.