Schistosomiasis is a debilitating disease that affects some 200 million people. It is caused by a parasitic flatworm that is transmitted to humans through contact with an air-breathing mollusc. The parasite and mollusc, respectively, are _____
Fill in the blank(s) with the appropriate word(s).
Answer: flukes and snails
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A microarray is a tool used in genetic research to determine the mRNAs being produced in a particular tissue, and their relative level of expression. Known genes can therefore be assayed for their expression in different situations
One use of the technology is in cancer diagnosis and treatment. If a known gene functions as a tumor suppressor, predict which of the following pieces of evidence would be most useful in diagnosis of a cancer due to a mutation in this tumor-suppressor gene. A) The tissue sample shows a high level of gene expression relative to a control (noncancerous) sample. B) The tissue sample responds to treatment with a mitosis-promoting compound. C) The mRNAs for the targeted tumor suppressor sequence are not being produced. D) The mRNAs for cyclins and kinases show unusually high levels of expression.
A recessive trait will be observed in individuals that are ________ for that trait.
a) heterozygous b) homozygous or heterozygous c) homozygous d) diploid
The transporter indicated by the letter "A" in the above figure represents a(n) ____
a. active Br transporter b. sodium-potassium cotransporter c. passive potassium transporter d. calcium-phosphorus transporter e. sodium-calcium transporter
A set of symptoms that usually occur together and characterize a disorder is called
a. an abnormality. b. a deviation. c. a syndrome. d. a carrier. e. a pedigree.