PRACTICE QUIZ ON CELL DIVISION AND MENDELIAN GENETICS

Instructions: You may prefer to print out the quiz and mark it.  After you have finished marking the quiz, you can grade each question by clicking on a quiz answer.   When you click on a quiz answer, you will be given feedback indicating whether your answer is correct.  When you get a feedback response, click on the back arrow to return to the quiz. After scoring your quiz, you should have an idea if you need to study the material more.  Remember to post questions about things you don't understand in the Class Forum.

1.   The nucleus of a diploid cell at the end of telophase contains
      a. an even number of chromosomes
      b. an odd number of chromosomes
      c. one chromosome of each type
      d. chromosomes composed of two sister chromatids

2.  Chromosomes are visible during
     a.  the entire cell cycle            c. mitosis
     b. interphase                             d. both interphase and mitosis

3.  Which of the following is true of binary fission and mitosis?
     a.  Prokaryotic cells divide by binary fission and eukaryotic cells divide by mitosis.
     b.  Binary fission and mitosis result in daughter cells genetically identical to the parent cell.
     c.  Both (a) and (b) are true.
     d.  Neither (a) nor (b) is true.

4. Which of the following phases of mitosis is the opposite of prophase in terms of nuclear changes?
     a. interphase        b. metaphase        c. anaphase         d. telophase

5.  In which of the following kinds of the animal cells would the haploid state be present?
     a. skin        b. liver         c. muscle         d. sperm         e. nerve

6.  Which of the following meiotic processes increases genetic diversity?
     a. Crossing over
     b. Independent assortment
     c. Both (a) and (b)
     d. Neither (a) nor (b)

7. Synapsis occurs during
      a. prophase I       b. metaphase I       c.  prophase II       c. metaphase II    d. anaphase Il

8.  Humans have 46 chromosomes in their somatic cells.  The number of chromosomes in an          egg cell is _____.
      a. 23        b. 46         c. 92         d. 138

9.  Which of the following is true about homologous chromosomes?
      a. Each parent contributes one member of each pair.
      b. Most appear identical when viewed microscopically.
      c. Each homologue has genes for the same trait.
      d. Sperm and egg contribute pair members.
      e. all of the above are true

10. In meiosis, sister chromatids undergo separation in
      a. metaphase I         b. metaphase II         c. anaphase I       d. anaphase II

11-16. Work 11-16 before you check your answers! Choose from the column on the right an example of each of the following:

17. Assume enough crosses were made between flies of the types Dd and Dd to yield 1000             offspring. Of the following, the most likely distribution of genotypes in the offspring would be
      a. 240 Dd: 760 dd
      b. 752 DD: 248 dd
      c. 243 DD: 517 Dd: 240 dd
      d. 481 Dd: 519 dd

18. An individual has the following genotype Aa. What kind (s) of gametes could this individual form?
      a.  All would be Aa
      b.  All would be A since A is dominant
      c.  Half would contain A and half a
      d.  One-fourth would be AA, one-half Aa and one-fourth aa

19-21. Work 19-21 before you check the answers! This is the basic problem type in genetics. Be sure you can work problems like this before you tackle more difficult problem types.  If you are unable to do this problem, carefully review Objective 13 in Unit 5 of the Study Guide. 

19. Spotted fur (S) in rabbits is dominant and solid fur (s) is recessive. A pure-breeding spotted male is crossed with a solid female. The genotypes of these individuals are?
     a.  SS and Ss        b.Ss and Ss        c.Ss and ss         d.SS and ss

20. The offspring of this cross would have what appearance?
      a.  all would have spotted fur
      b.  half would have spotted fur and half would have solid fur
      c.  three-fourths would have spotted fur and one-fourth would have solid fur
      d.  none of the above

21. Two of these F₁ offspring mate. The genotypic ratio of the offspring from this cross would be
      a. 3 spotted: 1 solid
      b. all spotted
      c. 1SS : 2Ss : 1ss
      d. 1ss : 1ss

BIOWEB  Al BIO 101 Web Section  ELI BIO 101 Web Section 
nverdae@nvcc.edu
Emma Erdahl, Associate Professor of Biology
Northern Virginia Community College
Revised 8/23/00