Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
9th Edition
ISBN: 9780134442778
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 14, Problem 17TYK
Cultivated American cotton plants have a total of 52 chromosomes (2n = 52). In each cell, there are 13 pairs of large chromosomes and 13 pairs of smaller chromosomes. Old World cotton plants have 26 chromosomes (2n = 26), all large. Wild American cotton plants have 26 chromosomes, all small. Propose a testable hypothesis to explain how cultivated American cotton probably originated.
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Explain the terms haploid, diploid, and polyploid. Why is polyploidy so much more common in plants than in animals? Give examples of polyploid animals. Polyploid plants may occur naturally or they may be created intentionally by agricultural scientists. List four examples of polyploid commercial crops and explain why they are superior to their diploid ancestors.
Besides independent assortment of chromosomes, which one of the following terms best explains why a chromosome in one of your genetics is unlikely to be just like one you received from your parents?
A- crossing over
B- segregation
C- fermentation
D- glycation
E- random fertilization
What is one statement that would support the theory that all organisms are related?
A) The genetic code is almost universal.B) All flies have 2 wings.C) Eukaryotes have mitochondria.D) Prokaryotes have circular chromosomes.E) That the Theory of Pangenesis has held up to scrutiny for thousands of years
What is the difference between cross and self-fertilization? A. In cross-fertilization the gametes from one plant are used to fertilize the gametes of another plantB. In cross-fertilization the gametes from one plant are used to fertilize the gametes from the same plant
C. In self-fertilization the gametes from one plant are used to fertilize the gametes from another plantD. In cross-fertilization insects are used to pollinate the plants while in self-fertilization the investigator pollinates the plants
Chapter 14 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Edition (9th Edition)
Ch. 14 - Name the two types of speciation represented by...Ch. 14 - Fill in the blanks in the following concept map.Ch. 14 - Which concept of species would be most useful to a...Ch. 14 - According to the biological species concept,...Ch. 14 - Bird guides once listed the myrtle warbler and...Ch. 14 - Which of the following is an example of a...Ch. 14 - Biologists have found more than 500 species of...Ch. 14 - A new plant species C, which formed from...Ch. 14 - A horse (2n = 64) and a donkey (2n = 62) can mate...Ch. 14 - What prevents horses and donkeys from hybridizing...
Ch. 14 - When hybrids produced in a hybrid zone can breed...Ch. 14 - Which of the following factors would not...Ch. 14 - Explain how each of the following makes it...Ch. 14 - Explain why allopatric speciation would be less...Ch. 14 - What does the term punctuated equilibria describe?Ch. 14 - Can factors that cause sympatric speciation also...Ch. 14 - Cultivated American cotton plants have a total of...Ch. 14 - Prob. 18TYKCh. 14 - Prob. 19TYK
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- By conducting testcrosses, researchers have found that the sweetpea has seven linkage groups. How many chromosomes would youexpect to find in leaf cells of the plants?arrow_forwardAs shown gives the number of chromosomes in a haploid set of chromosomes. What is the lowest number in the table? What is the highest number? Most cells in plants are diploid, having two sets of chromosomes,so the number per nucleus should be doubled. How many chromosomes are present in each diploid potato nucleus? If a potato plant has 1 million cells, each with one diploid nucleus, how many chromosomes are present in the entire plant?arrow_forwardConsider a hypothetical DIPLOID organism with ONE PAIR of homologous chromosomes. How many DNA molecules are there per nucleus in a somatic cell in G1? 4 8 2 1 Picture 1 shows Bob’s chromosome #18 pair. Picture 2 shows Sue’s chromosome #18 pair. Bob and Sue have a stillborn son with three copies of chromosome #18 that look like picture 3. In which parent did the chromosome separation problem occur? Bob Sue Both parents You need additional information to determine which parent. Starting with a population of genetically identical mice, you discover two new independent mutant strains in which all of the animals have epileptic seizures. In both strains, you know that the epileptic seizures are due to a single DNA mutation. You cross a mutant mouse from one strain to a mutant mouse from the second strain and find that none of their many offspring undergo spontaneous seizures. From…arrow_forward
- In tobacco, if the diploid number of chromosomes is 48, how many chromosomes will be found in a pollen grain? a.)96 b.)48 c.)24 d.)12arrow_forwardYou perform a cross between two plants, one MmPp and one mmpp, and obtain offspring with the following phenotypes: 42 MP; 374 Mp; 367 mP; 27 mp. What can you conclude from these data? ONLY PICK ONE OF THE ANSWERS: The M and P genes are on different chromosomes The recombinant progeny are mP and Mp The M and P genes are far apart on the same chromosome The recombinant progeny are MP and mparrow_forwardIn Question 23, if one chromosome has R and T and the homologous chromosome also has R and T, does linkage matter? What is the single type of genotype that this plant can produce in its gametes?arrow_forward
- Create a chromosome map each set of three genes from the given information. a) The crossover frequency between gene A and gene B is 23%, the crossover frequency between gene B and gene C is 11%, and between gene A and C is 12%arrow_forwardThe production of which structure in a flowering plant involves genetic recombination? A. haploid gametes B. haploid spores C. diploid gametes D. diploid sporesarrow_forwardFishlake national forest in Utah contains a stand of 40,000 aspen trees, all of which came from a single seed. That is they are clones of each other. How did the single organism come to manifest itself as 40,000 trees?arrow_forward
- The somatic cells of an allotetraploid containa. one set of chromosomes from four different species.b. two sets of chromosomes from two different species.c. four sets of chromosomes from one species.d. one set of chromosomes from two different species.arrow_forwardCorn has 10 chromosomes per set, and the sporophyte of the species is diploid. If you performed a karyotype, what is the totalnumber of chromosomes you would expect to see in each of thefollowing types of cells?A. A leaf cellB. The sperm nucleus of a pollen grain C. An endosperm cell after fertilizationD. A root cellarrow_forwardThe horse (Equus caballus) has 32 pairs of chromosomes, whereas the donkey (Equus asinus) has 31 pairs of chromosomes. How many total chromosomes would be expected in the somatic tissue of a mule, which is a hybrid of these two animals? Hint: a hybrid donkey is created by the union of a normal gamete from a horse and a normal gamete from a donkey. Group of answer choices 31.5 62 126 none of these is correct 63arrow_forward
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