Genetics Exam Essay Example
GENETICS EXAM I
You may write all over this exam, but only your #2 pencil answers on the blue opscan sheets will be graded. Bubble-in only one answer for each question; there are no purposely tricky questions.
If you think you have found a trick question or a question is not clear, ASK when leaving the exam room.
You may leave when you are done.
1. Chromosomes, colored bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomes aligned in pairs along the human cells equatorial plate. At this stage there are______chromatids. a. 23 b. 46 c. 92 d. 8 e.16
2..After pairing at metaphase I chromosomes disjoin a. without centromeric fission. b. with chromatids together. c. into opposite daughter cells. d. a,b & c are all true.
3. If a pair of chromosomes at metaphase I contain the alleles A & A in one chromosome and a & a in the other chromosome the first daughter cells will contain a. either a & a or A & A b. either A & a or a & A c. A & a and A & a d. AB, Ab, aB & ab e. a
4. One reason that parents in many cultures have for centuries asked that their children marry their "own kind" was the belief that the material basis of inheritance was fluid (BLENDING THEORY). Marriage outside their own kind would adulterate the purity of the blood lines. Mendel's experiments refuted this fluid based theory of inheritance.(Not all parents know this.) The critical observation in Mendel's work which led to the rejection of BLENDING THEORY was a. chromosome condensation b. reappearrance of the recessive phenotype in the F2 c. anaphase I pairing d. mitosis e. enteleky
5. The gametic ratio for a heterozygote is roughly 1:1, 1/2 : 1/2 or whatever expression you like for equivalence. This results from a. anaphase I disjunction b. mitotic crossingover c. Chi-square
You may write all over this exam, but only your #2 pencil answers on the blue opscan sheets will be graded. Bubble-in only one answer for each question; there are no purposely tricky questions.
If you think you have found a trick question or a question is not clear, ASK when leaving the exam room.
You may leave when you are done.
1. Chromosomes, colored bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomes aligned in pairs along the human cells equatorial plate. At this stage there are______chromatids. a. 23 b. 46 c. 92 d. 8 e.16
2..After pairing at metaphase I chromosomes disjoin a. without centromeric fission. b. with chromatids together. c. into opposite daughter cells. d. a,b & c are all true.
3. If a pair of chromosomes at metaphase I contain the alleles A & A in one chromosome and a & a in the other chromosome the first daughter cells will contain a. either a & a or A & A b. either A & a or a & A c. A & a and A & a d. AB, Ab, aB & ab e. a
4. One reason that parents in many cultures have for centuries asked that their children marry their "own kind" was the belief that the material basis of inheritance was fluid (BLENDING THEORY). Marriage outside their own kind would adulterate the purity of the blood lines. Mendel's experiments refuted this fluid based theory of inheritance.(Not all parents know this.) The critical observation in Mendel's work which led to the rejection of BLENDING THEORY was a. chromosome condensation b. reappearrance of the recessive phenotype in the F2 c. anaphase I pairing d. mitosis e. enteleky
5. The gametic ratio for a heterozygote is roughly 1:1, 1/2 : 1/2 or whatever expression you like for equivalence. This results from a. anaphase I disjunction b. mitotic crossingover c. Chi-square