Chapter 13 ans - Ch 13 Multiple Choice Identify the letter...

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Ch 13 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. What is a genome? a. the complete complement of an organism's genes b. a specific sequence of polypeptides within each cell c. a specialized polymer of four different kinds of monomers d. a specific segment of DNA that is found within a prokaryotic chromosome e. an ordered display of chromosomes arranged from largest to smallest ____ 2. Which of the following statements about genes is incorrect ? a. Genes correspond to segments of DNA. b. Many genes contain the information needed for cells to synthesize enzymes and other proteins. c. During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg. d. Under normal circumstances, each chromosome contains precisely one gene. e. Genetic differences can result from changes in the DNA called mutations. ____ 3. Asexual reproduction and sexual reproduction are different in that a. individuals reproducing asexually transmit 100% of their genes to their progeny, whereas individuals reproducing sexually only transmit 50%. b. asexual reproduction produces offspring that are genetically identical to the parents, whereas sexual reproduction gives rise to genetically distinct offspring. c. asexual reproduction involves a single parent, whereas sexual reproduction involves two. d. asexual reproduction only requires mitosis, whereas sexual reproduction always involves meiosis. e. all of the above ____ 4. How do the two members of a pair of homologous chromosomes differ from each other? a. their length b. the identity and relative position of the genes present on each of the chromosomes c. their staining patterns d. the position of the centromere within each of the chromosomes e. the precise sequence of the DNA within each of the chromosomes ____ 5. What is a karyotype? a. the set of unique physical characteristics that define an individual b. the collection of all the mutations present within a genome c. a unique combination of chromosomes found in a gamete d. a system of classifying cell nuclei e. a display of every pair of homologous chromosomes within a cell, organized according to size and shape ____ 6. By examining a karyotype, it is possible to determine a. which of two related plant forms is a gametophyte, and which is a sporophyte. b. the sex of an animal. c. the age of a fungus. d. A and B only e. A, B, and C ____ 7. At which stage of mitosis are chromosomes photographed in the preparation of a karyotype? a. prophase
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b. metaphase c. anaphase d. telophase e. interphase ____ 8. The human X and Y chromosomes are a. both present in every somatic cell of males and females alike. b.
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This note was uploaded on 12/13/2010 for the course ACT 101 taught by Professor Jenkins during the Spring '10 term at Alabama State University.

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Chapter 13 ans - Ch 13 Multiple Choice Identify the letter...

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