COMPLETE THIS QUIZ BY YOURSELF, PRINT IT, AND TURN IT IN AT THE BEGINNING OF DIS

Question

COMPLETE THIS QUIZ BY YOURSELF, PRINT IT, AND TURN IT IN AT THE BEGINNING OF DISCUSSION WED, May 24. (Note: "The printer wasn't workingwas out of ink/had a paper jam" is not a valid excuse for turning in your pre-lab quiz late assignment soon enough that you allow adequate time to print it off. The standard response to "The printer malfunctioned" will be "Not my problem." 5 pts 1. Indicate whether each of the following occurs during mitosis, meiosis, or both a) b) c) d) Homologous chromosomes pair up A spindle of microtubules forms and is involved in separating sister chromatids Crossing over Two genetically identical daughter cells are formed Chromosomes align along a metaphase plate 2 pts 2. Circle EACH choice that is characteristic of homologous chromosomes a) Each member of the pair may carry different alleles for the same genes b) They are genetically identical c) They carry genes for the same traits in the same sequence d) They are the same size and shape and have the same banding patterns when stained 1 pt 3. What do we call the phase in the cell cycle in which chromosomes form duplicate chromatids? A diploid cell has 3 pairs of homologous chromosomes. The first pair consists of chromosomes Aj and Az, the second pair consists 2 pt 4. of chromosomes Bi and B2, and the third pair consists of chromosomes Ci and C2 Write four genetically different possible combinations of chromosomes that could result after this cell goes through meiosis (Note: There are actually 8 different possibilities-you just have to figure out 4 of them)

Explanation / Answer

Answer 1) a) during meiosis

b)during meiosis

c)during meiosis

d) mitosis

e)mitosis

ANSWER 2) Each member of the pair may carry different alleles for the same gene.

Answer 3) during S (Synthesis ) phase of interphase.

Answer 4)A1B1C1, A1B1C2, A2B1C1, A2B1C2

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