Biol100B_Sample MidtermIII - Below are some practice...

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Below are some practice questions for Midterm 3. These questions may be repeated on the actual exam; therefore, answers will not be provided. Please note ALL material covered in lecture is “fair game” for the actual exam, even if it is not covered on the practice exam. The actual exam will have about 50-60 questions. Multiple Choice : Choose the one alternative that best completes the statement or answers the question. 1. Epigenetics are heritable changes in gene expression that a. Result from a change in the DNA nucleotide sequence b. Do not result from a change in the DNA nucleotide sequence c. Result from a change in the mRNA nucleotide sequence d. Both A and C 2. A somatic cell of a normal female with 46 chromosomes contains how many Barr bodies? a. None b. 1 c. 2 d. Depends on the age of the woman 3. If a man of blood group AB marries a women of blood group A whose father was of blood group O, to what different blood groups can this man and woman expect their children to belong? (6 points) a. AB , A b. AB,A,O c. AB,A,O, B d. AB,A,B 4. In the pedigree below, the darkened figures indicate an individual with hemophilia, a sex-linked recessive disorder. What is the genotype of female II-3? I II III a. X H X h b. X H X H c. X h X h d. Can be both A and B
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5. Huntington's disease is caused by the allele H , which is completely dominant to the normal recessive allele h . Consider a couple where the man has the genotype Hh , and the woman has the genotype hh . What is the chance that their first child will develop Huntington's disease?
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This note was uploaded on 03/06/2011 for the course BIOL 100B taught by Professor Nargesshassanzadeh-kiabi during the Winter '08 term at California State University Los Angeles .

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Biol100B_Sample MidtermIII - Below are some practice...

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