Chapter 6: Chromosomes and Cell Division Clicker Questions by Kristen Curran, University of Wisconsin-Whitewater

How might telomere length be affected in a cloned animal like “Dolly” the sheep? Telomeres might be longer than normal. Telomeres might be shorter than normal. Telomeres might be of normal length. No telomeres would be present. 2: Dolly was six years old when she died, and her telomeres were abnormally short. 2

In which part of the cell cycle does the cell spend most of its time? Interphase Mitosis G2 DNA synthesis 1 3

Review: If an incorrect base is placed in the DNA during replication, the mutation would be called a: deletion insertion substitution chromosomal breakage 3 4

What cellular process listed below might involve mitosis? 1. Wound healing 2. Making insulin 3. Glucose transport 4. Muscle contraction

Mitosis Card Game Classroom Catalyst See Activity Three of the Chapter 6 Instructor’s Manual, found on the Instructor’s Resource DVD or Faculty Lounge.

Which of the following processes occurs first during mitosis? Sister chromatids separate. Sister chromatids line up at the equator of the cell. Chromosomes condense. Cytokinesis 3 7

Put the events of mitosis listed below in the correct order. Sister chromatids separate. Sister chromatids line up at the equator of the cell. Chromosomes condense. Cytokinesis 1234 3214 3241 3124 2 8

Why do chemotherapy and radiation affect cancer cells and normal cells? Both treatments affect cells that are in G1. Both treatments affect cells that are actively dividing. Both treatments affect cells that have a high metabolism. Both treatments affect cells that have stopped dividing. 2 9

A human sperm contains ___ chromosomes, but when the sperm fuses with an egg, the total number of chromosomes is ____. 46; 92 15; 30 23; 46 23; 23 3 10

Meiosis Card Game Classroom Catalyst See Activity Three of the Chapter 6 Instructor’s Manual, found on the Instructor’s Resource DVD or Faculty Lounge.

What is the final outcome of meiosis? Four genetically identical cells Four genetically non-identical cells Two genetically identical cells Two genetically non-identical cells 2 12

What event or events occur during meiosis to make each resulting gamete genetically non-identical? Crossing over between homologous chromosomes. Alignment between pairs of homologous chromosomes can differ during Metaphase I (independent assortment). Separation of sister chromatids during Anaphase II. Both 1 and 2 are correct. All of the above. 4 13

If an organism lives in an environment that is variable, it will most likely use _________ reproduction via the process of ___________. Asexual; meiosis Asexual; mitosis Sexual; meiosis Sexual; mitosis 3 14

The sex ratio (number of females vs The sex ratio (number of females vs. males) of which of the following species might be most affected by global warming? Humans Bees Birds Turtles 4 15

Three copies of chromosome 21 (small chromosome) A non-disjunction is caused by a failure of chromosomes to separate properly during meiosis. Which non-disjunction listed below will cause death of the zygote in the womb? Three copies of chromosome 21 (small chromosome) Two copies of the X chromosome Two copies of the Y chromosome Three copies of chromosome 1 (large chromosome). 4 16