Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 10TYU
FOCUS ON INFORMATION
In sexually reproducing species, each individual begins life with DNA inherited from both parent organisms. In a short essay (100-150 words), apply this idea to what occurs when organisms of two species that have homologous chromosomes mate and produce (F1) hybrid offspring. What percentage of the DNA in the F1 hybrids' chromosomes comes from each parent species? As the hybrids mate and produce F2 and later-generation hybrid offspring, describe how recombination and natural selection may affect whether the DNA in hybrid chromosomes is derived from one parent species or the other.
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Homologous Chromosomes
We have discussed homologous chromosomes before. This idea is
essential to the understanding of genetics, so we will review it again.
Information
• Very simple organisms have only one set of chromosomes and they
are haploid.
► More complex organisms have two sets of chromosomes and are
diploid.
• Haploid organisms have one of each kind of chromosome and one of
every kind of gene.
Diploid organisms have two of each kind of chromosome and two of
kind of gene.
every
The two chromosomes of each kind in a diploid organism are called
homologous chromosomes because they are carrying the same
kind of traits (genes). Homo means "same."
► A human has 23 different kinds of chromosomes that are given
numbers from 1 to 23. Because we are diploid organisms we have two
of each of the different kinds. So, we have 46 chromosomes in all, made
up of 23 homologous pairs.
? QUESTION
1. How many sets of DNA molecules or chromosomes does a diploid
organism have?
2. How many sets of DNA…
Genes A and B are 7.5 map units apart on one chromosome. Genes C and D are 8.0 map units apart on a second non-homologous chromosome.
•
The recombination frequency between
A and B is?
•
The recombination frequency between
A and C is?
•
The recombination frequency between
C and D is?
•
The recombination frequency between B and D is?
Chapter 22 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 22.1 - Prob. 1CCCh. 22.1 - WHAT IF? Suppose you are studying two bird species...Ch. 22.2 - Contrast allopatric and sympatric speciation....Ch. 22.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 22.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 22.3 - What are hybrid zones, and why can they be viewed...Ch. 22.3 - WHAT IF? Consider two species that diverged while...Ch. 22.4 - Speciation can occur rapidly between diverging...Ch. 22.4 - Summarize evidence that the yup flower-color locus...Ch. 22.4 - MAKE CONNECTIONS Compare Figure 10.11 with Figure...
Ch. 22 - The largest unit within which gene flow can...Ch. 22 - Males of different species of the fruit fly...Ch. 22 - According to the punctuated equilibria model, A....Ch. 22 - Bird guides once listed the myrtle warbler and...Ch. 22 - Which of the following factors would not...Ch. 22 - Plant species A has a diploid number of 12. Plant...Ch. 22 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 22 - SCIENCE, TECHNOLOGY, AND SOCIETY In the United...Ch. 22 - FOCUS ON EVOLUTION Explain the biological basis...Ch. 22 - FOCUS ON INFORMATION In sexually reproducing...Ch. 22 - Prob. 11TYU
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- Background Info Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is kicked out, resulting in a diploid offspring.Triploid trout are produced in the lab to provide sterile fish stock for lakes. Shortly after the eggs are fertilized, scientists place them in a warm water bath to prevent the extra chromosomes from being removed. The result is a triploid fish that cannot reproduce.Rainbow Trout: n = 30 Global warming is an issue affecting many species around the world. Warming has caused the temperatures in lakes and rivers to increase and stay elevated for longer periods of time. Question Select the FOUR numbers that describe the possible effects of global warming on the reproduction of rainbow trout in the wild and on biodiversity. The extra set of chromosomes remains. The extra set of chromosomes is removed. The offspring are diploid (2n).…arrow_forwardNeed help with the diagram The STR DNA marker DS11 is located on the p arm of the chromosome #8 in humans. Molecular analysis has shown that Charlie Chaplin is a heterozygote for the STR marker (genotype DS11A and DS11B) Using this knowledge, provide a diagram of meiosis showing only the movements of chromosome 8 (assume no nondisjunction). Throughout, indicate where the marker may be found (in other words, label the chromosome to show where the STR markers can be found. please only show the chromosomes at interphase, metaphase 1, end of meiosis 1, metaphase 2, and end of meiosis 2.arrow_forwardI need help with b, c, d the choices for c) are haploid, diploid or tetraploid the choices for d) are same chromosome, a pair of homologus chromosomes, or two different chromosomesarrow_forward
- Diploid vs. Haploid: Given 2n = 30a. Haploid (n) number? b. This organism has a total of how many chromosomes? c. How many different pairs of chromosomes does this organismhave?arrow_forwardSketch a series of diagrams showing each of the following, making sure to end each series with haploid cells:(a) How a pair of alleles for a single locus segregate in meiosis(b) How the alleles of two unlinked loci assort independently in meiosis(c) How the alleles of two linked loci undergo genetic recombinationarrow_forwardAll of the above 8. Which is the correct description of the human chromosome number? * O2n =23 (where n=23, the number of different numbered human chromosomes) O2n = 46 (where n=23, the number of different numbered human chromosomes) O 4n = 23 (where n=23, the number of different numbered human chromosomes) O4n = 46 (where n=23, the number of different numbered human chromosomes) Any comments please use this space (e.g. to clarify an answer or point out w issues on questions, etc.)arrow_forward
- Why is meiosis useful? Select all that apply 1. I produces genetically variable offspring 2. it maintains the chromosome number between generations 3. it reduces the frequency of mutations 4. it provides an alternative route to cell division for cells that fail to complete mitosis 5. It does not require proteinsarrow_forwardConstruct a chromosome map from the following charts showing crossover frequencies for linkage groups on autosomes. (this one is tricky due to the unusual recombinations Gene Combinations Recombination Frequency y/w 2.2 v/m 3.0 v/r 26.6 v/w 30.0 v/y 32.2 w/m 33.0 y/m 35.2 w/r 56.6arrow_forwardIn what 3 ways does sexual reproduction result in genetic recombination?arrow_forward
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