Midterm3-F07-key

Midterm3-F07-key - BIO 205 Foundations of Biology Midterm...

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BIO 205 Foundations of Biology Midterm Exam 3 100 points Fall 2007 Name: ___________________________ KEY __________________________________ 1) What do all human males inherit from their mother? A) mitochondrial DNA B) an X chromosome C) the SRY gene  D) A and B only E) A, B, and C  Use the following information to answer the two questions below. A cell with two pairs of chromosomes (four chromosomes total) is going through mitosis. The diagrams below show the cell at various stages during the process. 2) Which illustration shows PROMETAPHASE of mitosis? E 3) Which illustration shows ANAPHASE of mitosis? A 4) In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous ( Rr) offspring of red (RR) and white (rr) homozygotes. Which of the following crosses would produce offspring in the ratio of 1 red : 2 roan : 1 white ? A) red x roan B) roan x roan C) white x roan D) red x white E) The answer cannot be determined from the information provided. 5) How do the daughter cells after the end of mitosis and cytokinesis compare with their
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Bio 205 - Exam 3 parent cell when it was in G 1 of the cell cycle? A) The daughter cells have the same number of chromosomes and the same amount of DNA. B) The daughter cells have half the number of chromosomes and half the amount of DNA. C) The daughter cells have half the amount of cytoplasm and half the amount of DNA. D) The daughter cells have the same number of chromosomes and half the amount of DNA. E) The daughter cells have the same number of chromosomes and twice the amount of DNA. 6) What is the name for the special region on a duplicated chromosome that holds the sister chromatids together? A) chromatin B) centromere C) centrosome D) centriole E) desmosome. The two questions below consist of five phrases or sentences concerned with the cell cycle. For each one, select the answer below that is most closely related to it. Each answer may be used once, more than once, or not at all. A. G 0 (G zero) B. G 1 C. S D. G 2 E. M 7) Some kinds of cells, like nerve cells and muscle cells, spend years in this phase without ever dividing. A 8) DNA is replicated during this phase of the cell cycle. C 9) Black fur in mice ( B ) is dominant to brown fur ( b ). Short tails ( T) are dominant to long tails (t) What fraction of the progeny of the cross BbTt x BBtt will have black fur and long tails? (Assume these characters are not linked.) A) 1/16 B) 3/16 C) 3/8 D) 1/2 E) 9/16 10) One difference between a cancer cell and a normal cell is that 2
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Bio 205 - Exam 3 A) cancer cells continue to divide even when they are tightly packed together. B) the cancer cell is unable to synthesize DNA. C) cancer cells cannot function properly because they suffer from density-dependent inhibition. D) cancer cells are always in the M phase of the cell cycle. E) the cell cycle of the cancer cell is arrested at the S phase. 11)
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This note was uploaded on 04/08/2008 for the course BIO 205 taught by Professor Stevens during the Spring '08 term at Portland.

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Midterm3-F07-key - BIO 205 Foundations of Biology Midterm...

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