BIOL180_Quiz4_Question and Answers. American Public University

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Quiz 4 Part 1 of 6 - Chapter 6 24.0 Points Question 1 of 33 3.0 Points Which type of human cells contain a half set of chromosomes (often written as n)?  A. nucleus  B. gamete  C. g... enome  D. chromosome Feedback:Great job. Question 2 of 33 3.0 Points What is the phase that not all cells enter, but is a phase where cells are not actively dividing?  A. G1 BOIL 180- Quiz 4  B. S  C. G2  D. G0 Feedback:Great job. Question 3 of 33 3.0 Points In diploid organisms, chromosomes are in a matched pair. What is the term for these chromosomes?  A. dissimilar  B. homologous  C. heterologous  D. unrelated Feedback:Great job. Question 4 of 33 3.0 Points What is the major difference during cytokinesis in eukaryotes with or without a cell wall?  A. cytokinesis does not occur in cells with a cell wall  B. cytokinesis does not occur in cells without a cell wall  C. cell plate in those without cell walls  D. cleavage furrow in those without cell walls Feedback:Great job. Question 5 of 33 3.0 Points What are oncogenes?  A. normal cells that are visible on an X-ray  B. genes that are responsible for hair loss  C. genes that cause a cell to become cancerous  D. cells that cause a mass without negative effects Feedback:Great job. Question 6 of 33 3.0 Points What is the purpose of checkpoints in the cell cycle?  A. to make the division move faster  B. to ensure detrimental mutations are not passed on  C. to keep any foreign DNA out of the cell  D. to maintain protein health in the cell Feedback:Great job. Question 7 of 33 3.0 Points What is the process of cell division called in prokaryotes?  A. Double fusion  B. Single mutation  C. Binary fission  D. Cytokinesis Feedback:Great job. Question 8 of 33 3.0 Points During which stage in interphase does DNA synthesis occur?  A. G1 phase  B. G2 phase  C. Mitosis  D. S phase Feedback:Great job. Part 2 of 6 - Chapter 7 24.0 Points Question 9 of 33 3.0 Points In what phase of meiosis does Independent assortment of homologous chromosomes occur?  A. interphase  B. cytokinesis  C. meiosis I  D. meiosis II Feedback:Great job. Question 10 of 33 3.0 Points Which event leads to a haploid cell in a life cycle?  A. fertilization  B. alternation of generations  C. mutation  D. meiosis Feedback:Great job. Question 11 of 33 3.0 Points Most animals and plants are diploid. What are cells containing two sets of chromosomes are referred to as?  A. somatic  B. aneuploid  C. gametes  D. polyploid Feedback:Any cell other than a reproductive cell is referred to this. Review Chapter 7. Question 12 of 33 3.0 Points Tortoise shell cats have variegated coat colors caused by X inactivation and are always what?  A. heterozygous males  B. homozygous females  C. homozygous males  D. heterozygous females Feedback:Great job. Question 13 of 33 3.0 Points In what phase of meiosis does separation of sister chromatids occur?  A. meiosis II  B. cytokinesis  C. meiosis I  D. interphase Feedback:Great job. Question 14 of 33 3.0 Points Meiosis produces daughter cells that are what?  A. for growth of the body  B. used to replace dead or damaged cells in the body  C. sexual reproduction  D. functionally different in different parts of the body Feedback:Great job. Question 15 of 33 3.0 Points What type of daughter cells are produced during meiosis?  A. genetically aneuploids  B. genetically identical to the mother cell  C. genetically distinct due to crossing over  D. genetically identical to each other Feedback:Great job. Question 16 of 33 3.0 Points The most common human trisomy is that of chromosome 21, which leads to what?  A. Klinefelter syndrome  B. Down’s syndrome  C. Cri-du-chat syndrome  D. Angelman syndrome Feedback:Great job. Part 3 of 6 - Chapter 8 24.0 Points Question 17 of 33 3.0 Points In humans, which of the following is not a sex-linked conditions?  A. some forms of color-blindness  B. left or right handiness  C. muscular dystrophy  D. hemophilia Feedback:Great job. Question 18 of 33 3.0 Points In humans, if a female that are homozygous recessive for a sex-linked disease, and the father has the dominate phenotype, what percentage of their male offspring will have the disease?  A. 50%  B. 0%  C. 25%  D. 100% Feedback:When determining the genotype of an offspring, a Punnett Square helps to determine the percentages of the genetic make-up. Remember, also, that only the male can contribute one X and one Y to the offspring. Review Chapter 8. Question 19 of 33 3.0 Points In a cross between two heterozygous (Aa) individuals, what is the likely percentage of the offspring that will be heterozygous?  A. 75%  B. 25%  C. 50%  D. 100% Feedback:Great job. Question 20 of 33 3.0 Points In humans, if a female that are homozygous recessive for a sex-linked disease, and the father has the dominate phenotype, what percentage of their female offspring will be carriers?  A. 25%  B. 0%  C. 100%  D. 50% Feedback:When determining the genotype of an offspring, a Punnett Square helps to determine the percentages of the genetic make-up. Review Chapter 8. Question 21 of 33 3.0 Points What are dominant traits are defined as?  A. in a heterozygote, one trait will conceal the presence of another trait for the same characteristic  B. when in a heterozygote, expression of two contrasting alleles such that the individual displays an intermediate phenotype  C. an interaction between genes such that one gene masks or interferes with the expression of another  D. a phenomenon in which alleles that are located in close proximity to each other on the same chromosome are more likely to be inherited together Feedback:Review Chapter 8. Question 22 of 33 3.0 Points In humans, females that are heterozygous for a sex-linked disease will on average pass the trait onto what percentage of her male offspring?  A. 0%  B. 25%  C. 100%  D. 50% Feedback:When determining the genotype of an offspring, a Punnett Square helps to determine the percentages of the genetic make-up. Review Chapter 8. Question 23 of 33 3.0 Points In humans, what percentage of offspring will be O blood-type from parents with A blood-type (IAi) and B blood-type (IB i)?  A. 50%  B. 25%  C. 100%  D. 0% Feedback: Great job. Question 24 of 33 3.0 Points How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCc?  A. 4  B. 8  C. 2  D. 1 Feedback:Great job. Part 4 of 6 - Lecture Material 12.0 Points Question 25 of 33 3.0 Points What can cause both helpful changes in our DNA sequence, such as an adaptation, as well as harmful ones, such as cancer?  A. mutations  B. dominant  C. heterozygote  D. replication Feedback:Great job! Question 26 of 33 3.0 Points Red hair is controlled by three common alleles on one chromosome, all of which are recessive. The likelihood of having a child with red hair is thus quite low. What type of inheritance is this?  A. Hierarchal  B. Hybrid  C. Mendelian  D. Multiple Feedback:Great job! Question 27 of 33 3.0 Points What is the theme behind Mendelian inheritance?  A. Even with peas, color and size are not predictable using a Punnett Square.  B. The majority of traits are recessive, so do not change often.  C. Traits are controlled by a single gene, and you get one copy from each parent.  D. All diseases are the result of mutations. Feedback:Great job! Question 28 of 33 3.0 Points What is the central dogma of molecular biology? [Show More]

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