Chapter 13 - 13 10 13 Cha pte r 13 Ch ap ter13 Due:2:30pm...

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13-10-13 Chapter 13 session.masteringbiology.com/myct/assignmentPrintView?assignmentID=2242938 1/28 Chapter 13 Due: 2:30pm on Thursday, October 3, 2013 You will receive no credit for items you complete after the assignment is due. Grading Policy Activity: Asexual and Sexual Life Cycles Click here to complete this activity. Then answer the questions. Part A What name is given to this process? To view the animation, click here . Then click on the image to start the animation. ANSWER: Correct A single individual is reproducing. Part B Human gametes are produced by _____. ANSWER: Correct Meiosis produces haploid gametes from a diploid parental cell. Part C Normal human gametes carry _____ chromosomes. ANSWER: asexual reproduction sexual reproduction gametogenesis fertilization meiosis the cell cycle fertilization mitosis meiosis asexual reproduction
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13-10-13 Chapter 13 session.masteringbiology.com/myct/assignmentPrintView?assignmentID=2242938 2/28 Correct This is the number of chromosomes in a single set of human chromosomes. Part D Which of these cells is (are) haploid? ANSWER: Correct Once meiosis I is completed, cells are haploid. Part E A diploid organism whose somatic (nonsex) cells each contain 32 chromosomes produces gametes containing _____ chromosomes. ANSWER: Correct 16 is half of 32. Chapter 13 Pre­Test Question 2 Part A What number and types of chromosomes are found in a human somatic cell? Hint 1. Somatic cells are diploid. 46 pairs of 46 23 5 23 pairs of A and D B B and C D C and D 30 8 16 32 64
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13-10-13 Chapter 13 session.masteringbiology.com/myct/assignmentPrintView?assignmentID=2242938 3/28 ANSWER: Correct Human somatic cells contain 22 pairs of autosomes and either two X chromosomes (in females) or an X and a Y chromosome (in males). Chapter 13 Pre­Test Question 3 Part A For what purpose(s) might a karyotype be prepared? Hint 1. A karyotype provides a display of all the chromosomes from a diploid cell. ANSWER: Correct Karyotypes can show if all of the chromosomes are present, and whether an individual is male (XY) or female (XX). In addition, by staining the chromosomes and examining the resulting banding patterns, it is possible to detect defects such as deletions, translocations, and inversions. Chapter 13 Pre­Test Question 4 Part A In alternation of generations, what is the diploid stage of a plant that follows fertilization called? Hint 1. In plants, both generations are multicellular. ANSWER: Correct The sporophyte is the diploid, multicellular stage of the plant that produces haploid spores by meiosis. n chromosomes 22 autosomes and 1 sex chromosome 45 autosomes and 1 sex chromosome 44 autosomes and 2 sex chromosomes 21 autosomes and 2 sex chromosomes for prenatal screening, to determine if a fetus has the correct number of chromosomes to determine whether a fetus is male or female to detect the possible presence of chromosomal abnormalities such as deletions, inversions, or translocations The first and second answers are correct.
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