Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 24, Problem 4TY
Summary Introduction
Introduction: The hybrid breakdown refers to the reproductive failure, in which, an organism may be viable and fertile but their following generations are born with reduced genetic viability and sometimes fatal genetic abnormalities.
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(d)
Scientists believe that the yellow fern arose from hybridization with another fern
on the island. Create a diagram of this hybridization that tracks the origin of the
chromosome number in the yellow fern.
n the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either bumblebees or hummingbirds; lavender flowered I. marabaensis and red flowered I. cavalcantei. Which of the follwing data would support the suggestion of natural interspecific hybridization with weak postzygotic isolation?
A.
magenta flowered hybrids found in the wild were infertile and bidirectionally crossing with parental species
B.
magenta flowered hybrids found in the wild were preferentially pollinated by introduced honeybees rather than parental pollinators
C.
In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis showed a mixture of parental floral characteristics
D.
In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis and magenta flowered hybrid plants were autotropic and showed hybrid viability
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Chapter 24 Solutions
Biology
Ch. 24.1 - Can you think of another example of two different...Ch. 24.1 - Prob. 1CSCh. 24.1 - Is temporal isolation an example of a prezygotic...Ch. 24.1 - Prob. 3CCCh. 24.2 - Prob. 1CSCh. 24.2 - Prob. 1EQCh. 24.2 - Prob. 2EQCh. 24.2 - Prob. 3EQCh. 24.2 - Prob. 1CCCh. 24.2 - Prob. 2CC
Ch. 24.4 - Evo-Devo: Evolutionary Developmental Biology...Ch. 24.4 - Prob. 1CSCh. 24.4 - Prob. 2CCCh. 24 - Macroevolution refers to evolutionary changes that...Ch. 24 - Prob. 2TYCh. 24 - Prob. 3TYCh. 24 - Prob. 4TYCh. 24 - Prob. 5TYCh. 24 - Prob. 6TYCh. 24 - Prob. 7TYCh. 24 - Prob. 8TYCh. 24 - Prob. 9TYCh. 24 - Prob. 10TYCh. 24 - What is the key difference between prezygotic and...Ch. 24 - What are the key differences between gradualism...Ch. 24 - Prob. 3CQCh. 24 - Prob. 1COQCh. 24 - Discuss the type of speciation (allopatric or...
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- A prezygotic barrier prevents (a) the union of egg and sperm (b) reproductive success by an interspecific hybrid (c) the development of the zygote into an embryo (d) allopolyploidy from occurring (e) changes in allometric growtharrow_forwardTaking into consideration the following figure, which second crossover would have to occur (number of chromosomes) and between which genes the crossover would have to occur to generate the next arrangement of genotypes in the gametes. a. 1 and 3 between B and C b. 3 and 4 between A and B c. 2 and 3 between A and B d. 3 and 4 between B and C e. 1 and 4 between A and B f. 2 and 4 between B and Carrow_forwardPrezygotic isolating mechanisms prevent hybrid offspring from occurring between species because (a) the resulting offspring are not fertile and cannot reproduce. (b) the egg and sperm fuse and form a zygote, but it does not survive. (c) the egg and sperm do not ever meet or, if they do, cannot fuse to form a zygote. (d) all of the abovearrow_forward
- What can you assert regarding cytoplasmic inherited traits? A. extensive phenotypic variation exhibited, even within a single family B. reciprocal crosses that give different results C. All of the answers are correct. D. usually inherited from one parent, typically the maternal parent E. present in both males and femalesarrow_forwardThe diagram of a gamete below depicts a single chromosome within a gamete. The bars spanning the chromosome indicate 2 genes. Considering only the two genes shown, which of the following processes was NOT capable to produce genetic diversity among the gametes of an individual? O Select all that apply: Select one or more: ✓ a. independent assortment b. sex linkage c. recombination d. mutation e. fertilizationarrow_forwardInterspecific hybrids, if they survive, are (a) always sterile (b) always fertile (c) usually sterile (d) usually fertile (e) never sterilearrow_forward
- what is not true about hybrids between polar bears and grizzly bears in the wild (select all that apply) A. polar bear grizzly bear hybrids are still rare but are becoming more common b. polar bears are endangered and hybridization is thought to be a mechanism for their survival by adapting with grizzyly bear traits c. Climate change is causing grizzly and polar bears hybrids d. hybrids polar bears do not existarrow_forwardhybrid has two different genes for a given trait a. True b. Fasle If B indicates tallness then an organism with genes Bb will be short a. True b. False What is the result of meiosis l? a. two genetically identical cells b. four genetically different cells c. Two genetically different cells d. Four genetically identical cells In guinea pigs, black coat is dominant over white coat. To determine whether a black guinea pig is pure or hybrid black, it should be ideally phenotypically crossed with a; a. White guinea pig b. Black guinea pig c. Heterozygous guinea pig d. Homozygous dominant guinea pigarrow_forwardA. Part 1: F1 Generation Yellow Sampaguita- Homozygous recessive (cc) White Sampaguita- Homozygous dominant (CC) a. With the given sampaguita flowers, you will be crossing these two samples and identify the offspring using a punnet square. Indicate the ratio between each offspring B. Part 2: F2 generation a. With the results you have from Part 1 and using a punnet square, what are the offspring of your heterozygous parents to identify the F2 generation. Indicate the ratio between each offspring. Note: Please provide the punnet square and a detailed explanationarrow_forward
- According to the French naturalist Comte de Buffon (George Louis Leclerc), since the horse (Equus caballus), the donkey (Equus asinus), and the mountain zebra (Equus zebra) are usually unable to produce fertile hybrids when cross-mated, we should classify: the horse and the donkey as members of the same species, but the zebra as a separate species the donkey, the zebra, and the horse as members of the same species the zebra and the horse as members of the same species, but the donkey as a separate species the horse, the donkey, and the zebra as three different species the donkey and the zebra as members of the same species, but the horse as a separate speciesarrow_forwardg Has 39 päirs of chromosomes, a wolf has 39 pairs of chromosomes, but a red fox has only 17 pairs of chromosomes. Dog-wolf hybrids are well-known. How many chromosomes would you expect the hybrid to have? Would these chromosomes be homologous pairs? Dog-fox hybrids have occasionally claimed to occur, but none have ever been confirmed. If such a hybrid should ever be found, how many chromosomes would it have? Would these chromosomes be in pairs? Explain why or why not.arrow_forwardAs the number of generations increases in a population, it would be expected that O a. The number of meiotic recombination events would increase and linkage disequilibrium would decrease O b. The number of meiotic recombination events would decrease and linkage disequilibrium would increase O c. The number of meiotic recombination events would decrease and linkage disequilibrium would decrease O d. The number of meiotic recombination events would increase and linkage disequilibrium would increasearrow_forward
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