Question 24 Listen A unicorn has 11 pairs of chromosomes. How many sister chromatids will it have at metaphase of mitosis a) 11 b) 44 ○ c) 2 d) 22
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Genetics Question 24
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- Question 3 Review 12.1 Cell division. Match the term and its description. Each term can only be used once. The division of the genetic material in the nucleus is termed | Choose ) as The division of the cytoplasm is called [Choose)QUESTION 5 Assuming mitosis is divided into prophase, prometaphase, metaphase, anaphase, and telophase, identify the events that take place in metaphase. The chromosomes move toward the equator by action of the kinetochore microtubules. The nucleolus disappears. U Centrioles replicate. The nuclear envelope disappears. Microtubules attach to kinetochores. All chromosomes are aligned on the metaphase plate. Sister chromatids split. Chromosomes condense. Spindle fibers form. Centrioles are migrating to opposite sides of the nucleus. QUESTION 6 Assuming mitosis is divided into prophase, prometaphase, metaphase, anaphase, and telophase, identify the events that take place in anaphase. Centrioles are migrating to opposite sides of the nucleus. Chromosomes decondense. The nuclear envelope reforms. The chromosomes move toward the equator by action of the kinetochore microtubules. All chromosomes are aligned on the metaphase plate. The nucleolus disappears. Sister chromatids split. Kinetochore…QUESTION 5 Assume that the diploid number of a certain species is four chromosomes, two large and two small (2n=4). a) Of the following figures, which represents a 3n (triploid) cell in mitotic metaphase? XX XX XX A B D b) For each of the wrong answers from part (a) above, explain briefly why it cannot represent a triploid cell in mitotic metaphase. X x x X
- Question 42 Which statement is true about mitosis? Page 1 (1E O It is a form of asexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. O It is a form of asexual reproduction resulting in daughter cells that each have one set of chromosomes identical to the parent cell. O l is a form of sexual reproduction resulting in daughter cells that cach have one set of chromosomes identical to the parent cell. O It is a form of sexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. « Previous Next Quiz saved at 9:05am Submit OQUESTION 34 Dynosaur inhibits the attachment of the microtubule motor protein dynein to microtubules. What will happen to the mitotic spindle positioning and chromosome segregation if Dynosaur is added at the start of prophase and present through the end of cytokinesis? Mitotic spindle positioning and chromosome segregation will proceed normally. The mitotic spindle would no longer be anchored to the plasma membrane and chromosomes might not be equally distributed between the daughter cells following anaphase. The centrosomes will be pulled more strongly towards the plasma membrane and chromosome segregation would be unaffected. The mitotic spindle would disintegrate, and chromosomes will become randomly positioned all throughout the dividing cell.QUESTION 22 To understand gap junction activity in cancer cells, you do two experiments. First you inject a single normal cell in a group of normal cells that are surrounded by cancer cells with a dye. You observe that the dye spreads to the surrounding normal cells only (a). Then you inject a single cancer cell with the same dye and observe that the dye does not spread to any of the surrounding cells (b). la) Microinjed Suorescent dye gray Normal cell Cancerous cell white Fluorescent cell Ib) Fluorescent cell Which of the following is a logical interpretation of this experimental result ? O Fluorescent dyes are too big to move through gap junctions O Cancer cells have less actin than other cels O Cancer cells have increased gap junction activity. O Cancer cells have reduced gap junction activity.
- Question 19 Lysogenic cells have phages that are: A actively synthesizing viral proteins B biosynthesizing only in the cytoplasm in the eclipse period D inactive in the prophage phaseQUESTION 6 Which of the following is FALSE about mitotic cell division and mitosis? O A. Mitotic cell division is 6 stages: Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis while mitosis is 4 stages: Prophase, Metaphase, Anaphase, Telophase. O B. The terms mitotic cell division and mitosis are the same and they can be used interchangeably to refer to cells dividing to make more cells. O C.A mitotic cell division includes mitosis and mitosis is part of a mitotic cell division. O D. During mitotic cell division, 1 cell divides into 2 cells and during mitosis, 1 nucleus divides into 2 nuclei.Question 3 Anna (who produces eggs) and Syed (who produces sperm), have a child with Down's syndrome that results from trisomy of chromosome 21. Using a microsatellite sequence on chromosome 21, you run a gel. The gel imaged is attached; darker bands indicate signals of twice the intensity. If a nondisjunction event occurred in Anna during meiosis I, which lane (A, B, C, D) best fits the genotype of their child? Explain your choice, clearly identifying why that lane is correct and why the other lanes are incorrect. Assume no recombination.
- Question 44 Examine the diagram that shows the late stages of telophase during mitosis. Which statement describes what is happening? O The plant cell pinches in half to form two new cells. O The animal cell pinches in half to form two new cells. O The plant cell forms a cell plate dividing the cytoplasm to form two new cells. O The animal cell forms e cell plate dividing the cytoplasm to form Lwo new cells. * Previous ) 耳QUESTION 48 With regard to the process of mitosis, which of the following pairs is NOT matched correctly? Oa. Interphase - the cell grows, chromosomes replicate, and proteins are produced to prepare the cell to divide b. Prophase - chromosomes condense, and the nuclear membrane dissociates/breaks down c. Metaphase - chromosomes move toward opposite poles (or sides) of the cell d. Anaphase - sister chromatids separate e. Telophase - two distinct nuclei are formed; this is the stage immediately before cytokinesisQUESTION 9 Which of the following is/are found in prokaryotic cells? O 1. Mitochondria O 2. Chloroplasts O 3. Nuclear membrane O 4. Ribosomes O 5. Endoplasmic reticulum QUESTION 10 Mitochondria and chloroplasts differ in that O 1. mitochondria contain DNA, but chloroplasts do not O 2. chloroplasts contain DNA, but mitochondria do not. O 3. mitochondria harvest chemical energy, whereas chloroplasts convert light energy into chemical energy. O 4. mitochondria are enclosed within one membrane, whereas chloroplasts are enclosed within two. O 5. mitochondria have extensive infoldings of membrane, whereas chloroplasts do not have extensive internal membranes.