1. The genes for the traits that Mendel worked with are either located on different chromosomes or so far apart on the same chromosome that crossing over almost always occurs between them. How did this circumstance help Mendel recognize the principle of independent assortment? a. Otherwise, his dihybrid crosses would not have produced a 9: 3: 3:1 ratio of F2 phenotypes. b. The occurrence of individuals with unexpected phenotypes led him to the discovery of recombination c. It led him to the realization that the behaviour of chromosomes during meiosis explained his results. d. It meant that the alleles involved were either dominant recessive, which gave 3: 1 ratios in the F1 generation. 2. A child is born to a mother whose blood group is B and a father whose blood group is A. The child is of blood group A. According to this which of the following is true? A. The mother has Bombay blood group. B. The child's father is some other man. C. This is a normal case. D. The child has genotype IA/IA. 3. What makes the Incomplete Dominance and Co Dominance different than a normal Mendelian cross? a. There is no difference. b. There is no heterozygous genotype. c. The heterozygous genotype has a unique phenotype. d. There is only one phenotype regardless of genotype.

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Description: 1. The genes for the traits that Mendel worked with are either located on different chromosomes or so far apart on the same chromosome that crossing over almost always occurs between them. How did this circumstance help Mendel recognize the principle

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section12.2: Later Modifications And Additions To Mendel’s Principles

Problem 2SB: A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit...

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1. The genes for the traits that Mendel worked with are either located on different chromosomes or so far apart on the same chromosome that crossing over almost always occurs between them. How did this circumstance help Mendel recognize the principle of independent assortment? a. Otherwise, his dihybrid crosses would not have produced a 9: 3: 3:1 ratio of F2 phenotypes. b. The occurrence of individuals with unexpected phenotypes led him to the discovery of recombination c. It led him to the realization that the behaviour of chromosomes during meiosis explained his results. d. It meant that the alleles involved were either dominant recessive, which gave 3: 1 ratios in the F1 generation. 2. A child is born to a mother whose blood group is B and a father whose blood group is A. The child is of blood group A. According to this which of the following is true? A. The mother has Bombay blood group. B. The child's father is some other man. C. This is a normal case. D. The child has genotype IA/IA. 3. What makes the Incomplete Dominance and Co Dominance different than a normal Mendelian cross? a. There is no difference. b. There is no heterozygous genotype. c. The heterozygous genotype has a unique phenotype. d. There is only one phenotype regardless of genotype. 4. Incomplete dominance governs the pigment gene of a flower. A mating between heterozygotes yields the following phenotypic ratio: 10 yellow flowers, 35 pink flowers and white flowers. Which statement describes the situation? a. The flower pigment gene is defined by a pink and yellow allele. b. The heterozygotes were yellow. c. The heterozygotes were white. d. The flower pigment gene is defined by a red and a white allele. 5. Mendel's rules do not correctly predict patterns of inheritance for tightly linked genes or the inheritance of alleles that show incomplete dominance. Does this mean that his hypotheses are incorrect? A. Yes, because they are relevant to only a small number of organisms and traits. b. Yes, because not all data support his hypotheses. c. No, because he was not aware of meiosis or the chromosome theory of inheritance. d. No, it just means that his hypotheses are limited to certain conditions.

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