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BIOL 1362 - Exam Unit 1 spring09

BIOL 1362 - Exam Unit 1 spring09 - Name PS ID BIOL 1362...

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V.2 Name: PS ID#: BIOL 1362 - Introduction to Biological Science – EXAM 1 Dr. Ana Medrano 02/16/09 1) In mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long- haired individual and both long- and short-haired offspring result, one can conclude that a) the short-haired individual is homozygous. b) the short-haired individual is heterozygous. c) the long-haired individual is homozygous. d) the long-haired individual is heterozygous. e) This cannot be answered without more information. 2) If the same allele has two or more phenotypic effects, it is said to be a) codominant. b) a marker. c) linked. d) pleiotropic. e) hemizygous. 3) A bacterial cell gives rise to two genetically identical daughter cells by a process known as: a) nondisjunction. b) mitosis. c) meiosis. d) fission. e) fertilization. 4) The ABO blood groups in humans are determined by a multiple allelic system in which I A and I B are codominant and are dominant to i O . If an infant born to a type O mother also is type O, possible genotypes for the father are a) O or A. b) A or B. c) only O. d) O, A, or B. e) impossible to determine. 5) When a given trait is the result of multigene action, one of the genes may mask the expression of one or all other genes. This phenomenon is termed a) epistasis. b) epigenesis. c) dominance. d) incomplete dominance. e) None of the above 6) Damage to DNA can be caused by _______ absorbed by thymine in DNA, causing inter-base covalent bonds. a) X-rays b) cosmic radiation c) ultraviolet radiation d) smoke e) cigarettes 7) The complete phenotype of an organism is dependent on a) genotype. b) penetrance. c) expressivity. d) polygenes. e) All of the above 8) Each diploid cell of a human female contains _______ of each type of chromosome. a) one b) two c) four d) a total of 23 e) a total of 46 9) A linkage group corresponds to a) a group of genes on different chromosomes. b) the linear order of chromomeres on a chromosome. c) the length of a chromosome. d) a group of genes on the same chromosome. e) None of the above 10) An organism that produces either male gametes or female gametes, but not both, is called a) monoecious. b) dioecious. c) heterozygous. d) homozygous. e) parthenogenic. 11) Different forms of a gene are called a) traits. b) phenotypes. c) genotypes. d) alleles. e) None of the above 12) Which of the following are model organisms used in biological research? a) Pea plants b) Fruit flies c) E. coli d) Bread mold e) All of the above 13) It is predictable that half of the human babies born will be male and half will be female because
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V.2 a) of the segregation of the X and Y chromosomes during male meiosis. b) of the segregation of the X chromosomes during female meiosis. c)
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BIOL 1362 - Exam Unit 1 spring09 - Name PS ID BIOL 1362...

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