In the Igf2 gene, which allele is imprinted? Which is expressed?
A. Paternal, paternal
B. Paternal, maternal
C. Maternal, paternal
D. Maternal, maternal
A
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What is the relationship between the promoters for antisense RNA and the promoters of their target genes?
A) The promoters are oriented so that they transcribe opposite strands of the same segment of DNA. B) The promoters are found in different chromosomal regions but are controlled by the same sigma factors. C) The sense and antisense RNAs use the same promoter, both RNAs are produced from a single transcript that is processed. D) The sense and antisense RNAs are transcribed using the same promoter that is bidirectional.
Monkeys belong to the primate suborder Prosimi
____________________ Indicate whether the statement is true or false.
Hemophilia A is an X-linked recessive genetic condition. In humans it is due to a mutation in the F8 gene, which encodes a protein called coagulation factor VII. Coagulation factors are proteins important in blood clotting. Individuals with hemophilia, when injured, bleed longer than a normal, healthy individual; the inability to normally clot blood can be life threatening. Hemophilia is much more common in males than in females. Which of the following does NOT explain why this is so?
A. A female with one defective allele makes enough normal coagulation factor VII to clot blood and will not have hemophilia A. B. Females have to receive a defective allele from both their mother and their father to get hemophilia A. C. Males are hemizygous for the F8 gene, so they will have hemophilia A if they have one defective allele. D. Males have to receive a defective allele only from their father to get hemophilia A.
Some students consume large amounts of coffee and so-called energy drinks to help them stay alert when studying. You notice that many who engage in this practice seem to do poorly on exams. Suppose you want to investigate the relationship between caffeine consumption and exam performance. Which of the following statements would be an appropriate hypothesis?
(a). Students who consume large amounts of caffeine while studying will have lower exam scores than those who consume less caffeine. (b). One should avoid consuming too much caffeine while studying. (c). Too much caffeine is harmful to your health. (d). Many students consume large amounts of caffeine while studying. (e). Caffeine increases alertness but also increases anxiety.