During what stage of meiosis do chromosomes align on the spindle equator in homologous pairs?
Ans: Chromosomes align on the spindle equator in homologous pairs in metaphase I
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Which of the following statements about single nucleotide polymorphisms (SNPs) is correct? (Choose all that apply)
A. For some disorders, multiple SNPs plus environmental factors are necessary in order for the disorder to present itself. B. Genotyping SNPs instead of sequencing entire genomes allows researchers to find correlations between genetic risk factors and disease. C. SNPs are useful in the diagnosis of a disease but not in the prediction of an individual's risk for acquiring that disease. D. Individuals who are heterozygous for the S allele in the ?-globin gene are more likely to develop sickle-cell anemia than individuals who are homozygous for the S allele in the ?- globin gene. E. The presence of an SNP in an organism's genome when compared to the "standard" genome of that organism means that a disease condition will develop.
VNTRs are useful in DNA forensics because ________
A) the number of VNTRs varies between people B) the VNTRs have exactly the same sequence between people C) the VNTRs have very little variation in length D) the VNTRs act as an identifier for a group of individuals
Immediate hypersensitivity is ________ mediated, and delayed type hypersensitivity is ________ mediated
a. antibody / cell b. cell / antibody c. Th1 / IgE d. IgG / Th2
About 180 liters of blood plasma is filtered into human nephrons per day and, of that amount, about 2-3 liters leaves the body as urine. Therefore, the percentage of plasma filtrate that leaves as urine each day is about ________.
A. 0.1-0.2 percent B. 0.5-1.0 percent C. 1-2 percent D. 5-10 percent E. 10-20 percent F. 20-50 percent