___ 1. A cell in G2 phase has 8 chromosomes. How many chromosomes and chromatids will be found per cell when this original cell progresses to metaphase of mitosis? A. 4 chromosomes and 4 chromatids. B. 4 chromosomes and 8 chromatids. C. 8 chromosomes and 8 chromatids. D. 8 chromosomes and 16 chromatids. E. 16 chromosomes and 16 chromatids. ___ 2. At what phase of meiosis or mitosis does the picture at right best describe? A. Metaphase I B. Metaphase II C. Anaphase D. Anaphase II E. Anaphase I ___ 3. Which of the following best explains Mendel's law of segregation? A. Homologous chromosomes pair up during meiosis. B. Homologous chromosomes cause crossover during mitosis. C. Homologous chromosomes cause crossover during meiosis. D. Homologous chromosomes separate during meiosis and gamete formation. E. Homologous chromosomes separate during mitosis and cell division. ___ 4. For the pedigree to the left, what is the most likely inheritance pattern? A. Y-linked. B. Autosomal dominant. C. Autosomal recessive. D. X-linked dominant. E. X-linked recessive. ___ 5. Following his monohybrid crosses, Mendel also created F3 generation derived from his F2 plants. If Mendel crosses hundreds of F2 plants with round phenotypes (RR and Rr) with a wrinkled plant what frequency of round vs. wrinkled individuals should appear in the F3 generation? A. 66.6% Round vs. 33.3% wrinkled B. 50% Round vs. 50% Wrinkled C. 75% Round vs. 25% Wrinkled D. 100% Round
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In a diploid cell (2n = 8), how many chromatids are present during metaphase II? A: 2 B: 8 C: 6 D: 4
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5) What is the major difference between mitosis and meiosis I in a diploid organism? A) DNA replication takes place prior to mitosis, but not before meiosis I. B) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I. C) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II. D) Only meiosis I results in daughter cells that contain identical genetic information. 6) Homologous pairs of chromosomes align adjacent to one another at the metaphase plate of a cell at: A) metaphase I of meiosis. B) metaphase of mitosis. C) telophase II of meiosis. D) metaphase II of meiosis. 7) Which of the following statements about independent assortment or segregation is correct? A) The law of independent assortment is accounted for by observations of prophase I of meiosis. B) The law of segregation is accounted for by anaphase of mitosis. C) The law of independent assortment describes the behavior of two or more genes relative to one another. D) The law of segregation describes the behavior of two or more genes relative to one another. 8) Suppose two individuals with the genotype DdEeFf are mated. What fraction of the offspring are expected to be homozygous recessive for the three traits? A) 1/64. B) 1/4. C) 1/16. D) 1/8. 9) Which of the following phenotypes is an example of polygenic inheritance? A) pink flowers in snapdragons. B) skin pigmentation in humans. C) white and purple flower color in peas. D) the ABO blood group in humans. 10) If a man with type O blood marries with a woman with type AB blood, which of the following blood types could their children possibly have? A) AB and O. B) A, B, and O. C) A, B, AB, and O. D) A and B.
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