Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 14.1, Problem 3CC
MAKE CONNECTIONS Ø In some pea plant crosses, the plants are self-pollinated. Is self-pollination considered asexual or sexual reproduction? Explain. (See Concept 13.1.)
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The drooping, bell-like flower Aquilegia canadensis is adapted for cross-pollination. However, if the plant has not been pollinated previously, self-pollination can occur. However, if cross pollination occurs after self-pollination takes place, the pollen from cross pollination reaches the style before the pollen from self-pollination. Using course concepts and vocabulary 1) Provide a reasoning for this phenomenon. 2) Would this adaptation for reproduction be beneficial for the plant?
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Describe in detail a molecular mechanism that could explain how two groups of genetically identical plants differ in their gene expressions to produce different flower colors?
Chapter 14 Solutions
Campbell Biology
Ch. 14.1 - DRAW IT Pea plants heterozygous for flower...Ch. 14.1 - WHAT IF? List all gametes that could be made by a...Ch. 14.1 - MAKE CONNECTIONS In some pea plant crosses, the...Ch. 14.2 - Prob. 1CCCh. 14.2 - Two organisms, with genotypcs BbDD and BBDd, are...Ch. 14.2 - WHAT IF? Three characters (flower color, seed...Ch. 14.3 - What two properties, one structural and one...Ch. 14.3 - If a man with type AB blood marries a woman with...Ch. 14.3 - WHAT IF? A rooster with gray feathers and a hen...Ch. 14.4 - Prob. 1CC
Ch. 14.4 - Prob. 2CCCh. 14.4 - Prob. 3CCCh. 14.4 - MAKE CONNECTIONS In Table 14.1, note the...Ch. 14 - When Mendel did crosses of true-breeding purple-...Ch. 14 - DRAW IT Redraw the Punnett Square on The right...Ch. 14 - Inheritance patterns are often more complex than...Ch. 14 - Both members of a couple know that they are...Ch. 14 - Prob. 1TYUCh. 14 - A man with type A blood marries a woman with type...Ch. 14 - A man has six fingers on each hand and six toes on...Ch. 14 - Prob. 4TYUCh. 14 - Flower position, stem length, and seed shape are...Ch. 14 - Hemochromatosis is an inherited disease caused by...Ch. 14 - The genotype of F1, individuals in a tetrahybrid...Ch. 14 - What is the probability that each of thc following...Ch. 14 - Prob. 9TYUCh. 14 - Prob. 10TYUCh. 14 - In tigers, a recessive allele of a particular gene...Ch. 14 - In maize (com) plants,a dominant allele I inhibits...Ch. 14 - The pedigree belowtraces the inheritance of...Ch. 14 - Imagine that you are a genetic counselor, and a...Ch. 14 - EVOLUTION CONNECTION Over the past half century,...Ch. 14 - SCIENTIFIC INQUIRY You are handed a mystery pea...Ch. 14 - Prob. 17TYUCh. 14 - SYNTHESIZE YOUR KNOWLEDGE Just for fun, imagine...
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- A scientist pollinates a true-breeding pea plant with violet, terminal flowers with pollen from a true- breeding pea plant with white, axial flowers. Which of the following observations would most accurately describe the F2 generation? 75% violet flowers; 75% terminal flowers 75% white flowers in a terminal position 75% violet flowers; 75% axial flowers 75% violet flowers in an axial positionarrow_forwardWhat is/are the Process/es of Coevolution in insects and plants? Cite some references from the web.arrow_forwardWhat would be the effect on flowering time of over-expressing VIN3 (i.e., 35S:VIN3) in a winter annual Arabidopsis plant grown adjacent to a summer annual wild type plant in long days under warm conditions? Assume that the plants germinate at the same time. In answering the question, describe the molecular mechanism that allows you to make this conclusion.arrow_forward
- MAKE CONNECTIONS In seed plants, how might retaining the gametophyte within the sporophyteaffect embryo fitness? (See Concepts 17.5, 23.1, and 23.4 to review mutagens, mutations, and fitness.)arrow_forwardWhat are homeotic genes? Please exaplain ow they control the sequence of whorl development in flowers according to the ABCDE model.arrow_forwardConsider the following statements and indicate whether each presents an idea of Jean- Baptiste Lamarck, of Charles Darwin or of both scientists. On the blank before the statement, write L for Lamarck, D for Darwin or B for both. 1) An organism directs its own adaptations because of an inborn urge to be perfect (that is, to be better suited to the environment). 2) Individuals do not evolve, but populations do. 3) Individuals in a population exhibit variation in their traits, such that no two individuals are exactly alike. 1 4) Many different kinds of living things are adapted to their environment. 5) Members of a population who are better adapted to the environment have higher chances of survival and reproduction. 6) Parents pass on their traits to their offspring. Carrow_forward
- Using the 'ABC model' of floral development, what would you expect the flowers of a mutant plant to look like if both A & B gene function had been destroyed?arrow_forwardno need to explain just need to know if its a,b c, or d 1.) Alternation of generation refers to the alternation of diploid and haploid generation. What is the difference between the alternation of generation in moss and pine? a.) In moss, gametophyte is dominant; whereas, in pine, sporophyte is dominant. b.) In moss, sporophyte is dominant; whereas, in pine, gametophyte is dominant. c.) In moss, gametophyte is dependent on sporophyte; whereas, in pine, sporophyte is dependent on gametophyte. d.) In moss, meiosis occurs during gamete formation; whereas, in pine, it occurs in zygote formation. 2.) Meiosis involves two phases, meiosis I and meiosis II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic division of the primary spermatocyte results in two secondary spermatocytes. .What is the result of the first meiotic division of the primary oocyte? a.) two secondary oocytes b.) two polar bodies c.) two ovum d.) one secondary oocyte and…arrow_forwardWhat is the difference between self-pollination and cross-pollination? If pollen is transferred from the stamens of a flower to the stigma of the very same flower, is that cross-pollination or self-pollination? If it is transferredfrom the stamen of one flower to the stigma of another flower on the very same plant? If it is transferred from the stamen of one flower to the stigma of another flower on a different plant, but a plant that is a clone of the first one? Animals do not have pollen, of course, but why is it that most animals never have to worry about the equivalent problem of self-fertilization? Why cannot most animals fertilize themselves?arrow_forward
- Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in: (a) papaya (b) bottle gourd (c) maize (d) all of these.arrow_forwardPlants reproduce through various methods. Explain which method helps to create genetic variability in crop plants? Moreover elaborate mechanisms promoting self or cross pollination.arrow_forwardCan you answer both questions please (b) Based on the ABC model, what would be the predicted phenotype of a double AB mutant? (c) In developing flowers of dioecious Spinach and Thalictrum, stamens are not developed in female flowers, and carpels are not developed in male flowers. What is the simplest model of ABC class gene expression that might explain this? Whorl 1 Whorl 2 Whorl 3 Whorl 4 Wild type sepals petals stamens carpels A class gene Carpels stamens stamen carpel mutants B class gene Sepal Sepal carpel carpel C class gene Sepal petal petal sepal mutants mutantsarrow_forward
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