Campbell Biology & New Mastering eText Value Pack Access Code
1st Edition
ISBN: 9780321989574
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 13.1, Problem 3CC
WHATIF? → A horticulturalist breeds orchids, trying to obtain a plant with a unique combination of desirable traits. After many years, she finally succeeds. To produce more plants llke this one, should she crosibreed it with another plant or clone it? Why?
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Chapter 13 Solutions
Campbell Biology & New Mastering eText Value Pack Access Code
Ch. 13.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 13.1 - How does an asexually reproducing eukaryotic...Ch. 13.1 - WHATIF? A horticulturalist breeds orchids, trying...Ch. 13.2 - MAKE CONNECTIONS In Figure 13.4. how many DNA...Ch. 13.2 - VISUAL SKILLS In The karyotype shown in Figuro...Ch. 13.2 - WHAT IF? A certain eukaryote lives as a...Ch. 13.3 - MAKE CONNECTIONS Comparc tho chromosomes in a...Ch. 13.3 - WHAT IF? After the synaptonemal complex...Ch. 13.4 - What is the original source of Variation among the...Ch. 13.4 - The diploid number for fruit flies is 8, and the...
Ch. 13.4 - Prob. 3CCCh. 13 - Explain why human offifuing resemble their parents...Ch. 13 - Compare the life cycles of animals and plants,...Ch. 13 - Prob. 13.3CRCh. 13 - Prob. 13.4CRCh. 13 - A human cell containing 22 autosomes.and a Y...Ch. 13 - The two homologs of a pair move toward opposite...Ch. 13 - Meiosis II is similar to mitosis in that (A)...Ch. 13 - Prob. 4TYUCh. 13 - If we continue to follow the cell lineage from...Ch. 13 - DRAW IT The diagram shows a cell in meiosis. (a)...Ch. 13 - Explain how you can tell that the cell in question...Ch. 13 - EVOLUTION CONNECTION Many species can reproduce...Ch. 13 - SCIENTIFIC INQUIRY The diagram in quest ion 6...Ch. 13 - Prob. 10TYUCh. 13 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- In the early 1990s, Carolyn Napoli and her colleagues were working on petunias, attempting to genetically engineer a variety with dark purple petals by introducing numerous copies of a gene that encodes purple pigment in the flower petals (C. Napoli, C. Lemieux, and R. Jorgensen. 1990. Plant Cell 2:279–289). Their thinking was that extra copies of the gene would cause more purple pigment to be produced and would result in a petunia with an even darker hue of purple. However, much to their surprise, many of the plants carrying extra copies of the purple gene were completely white or had only patches of color. Molecular analysis revealed that the amount of mRNA produced by the purple gene was reduced 50-fold in the engineered plants compared with wild-type plants. Somehow, the introduction of extra copies of the purple gene silenced both the introduced copies and the plant’s own purple genes. Provide a possible explanation for how the introduction of numerous copies of the purple gene…arrow_forwardFrom an agricultural point of view, discuss the advantages and disadvantagesof selective breeding. It is common for plant breeders to take two different, highly inbred strains, which are the product of many generations of selective breeding, and cross them to make hybrids. How does this approach overcome some of the disadvantages of selective breeding?arrow_forwardDebate whether it is ethical for seed manufacturers to replace one controversial technique (genetic engineering) with another (mutagenesis) to avoid regulatory threats.arrow_forward
- selective breeding is done by what?arrow_forwardLooking at the diagram, in terms of the ancestral gene vs. the resultant genes, describe three functional outcomes resulting from gene duplicationarrow_forwardBackground: Each kernel on a cob of corn is a seed for a corn plant. Each kernel can be planted and a whole new corn plant can grow from this kernel. Each cob of corn has hundreds of kernels which were each created by the fertilization of hundreds of eggs from one corn plant and hundreds of pollen from another corn plant. Corn cobs allow for easy genetic analysis because looking at a corn cob is like looking at the hundreds of offspring created from two parents. Corn kernels can come in different colours and textures. It has been determined that purple (P) corn kernels are dominant to yellow (p) corn kernels. Smooth (M) kernels are dominant to shrunken (m) kernels. Purpose: With the use of chi-square analysis, determine if one should accept or reject the hypothesis that both parents that created a cob of corn were heterozygous for colour and heterozygous for texture (PpMm X PpMm). Apparatus & Method: Create a dihybrid cross and determine the expected phenotypic…arrow_forward
- VISUALIZE Use two different colors to depict the unduplicated chromosomes of species C with larger chromosomes (2n = 8) and species D with slightly smaller chromosomes (2n = 10), and of their F1 hybrid. Is the hybrid likely to be fertile?arrow_forwardUsing the five major processes, create your own flow diagram of the genetic engineering process.arrow_forward5) Make a flow chart outlining the steps involved in creating a transgenic crop.arrow_forward
- 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?arrow_forwardA. What traits are controlled by the branching gene and fruitcase gene? And how were they determined to be major players in the development of maize? B. Teosinte looks like a terrible plant to begin to domesticate for agricultural purposes. What hypothesis is put forth to explain farmers’ early interest in the plant? C. Often successful domestication of a plant or animal is due to the fact that this involved just a few gene changes. In what situation can changes in just a few genes dramatically change an organism's entire appearance? D. Who is Norman Borlaug?arrow_forward• Generation of new gene expression patterns or new geneproducts at rearrangement breakpoints provides variationthat is subject to _________arrow_forward
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