Before clotting factors from recombinant DNA became available, more than half of hemophiliacs in the U.S. acquired HIV from injection of clotting factors obtained from donated blood
a. True
b. False
Indicate whether the statement is true or false
True
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Small interfering RNAs (siRNAs) are a type of small regulatory RNA that, like microRNAs, are incorporated into the RISC complex
A. true B. false
You are a genetic counselor, and a couple comes to you with concerns that if they have a child together, he or she
could have hemophilia. The woman has an X-linked recessive form of hemophilia, but the man does not. How should you advise them?
a. Half of their children will have hemophilia.. b. All of their sons and half of their daughters will have hemophilia. c. None of their children will have hemophilia, but all of their daughters will be carriers for hemophilia. d. Each of their sons will have a 50% chance of having hemophilia, and each of their daughters will have a 50% chance of being carriers. e. All of their sons will have hemophilia, and all of their daughters will be carriers.
A structure essential to the reproduction of gymnosperms is the
A. flower. B. spore. C. cone. D. angiosperm.
Four of the following statements are ways in which pathogenic fungi can kill plant tissue. Which one is the exception?
A. Decreasing water absorption B. Depriving plants of sugars it needs C. Breaking down rocks by releasing acids D. Reducing nutrients for seed production E. Secreting toxins