ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Chapter 12, Problem 12TYU
FOCUS ON INFORMATION
The continuity of life is based on heritable information in the form of DNA In a short essay (100‒150 words), relate the structure and behavior of chromosomes to inheritance in both asexually and sexually reproducing species.
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The continuity of life is based on heritable information in the form of DNA. Relate the structure and behavior of chromosomes to inheritance in bot asexually and sexually reproducing species.
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Chapter 12 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 12.1 - Which one of Mendels laws relates to the...Ch. 12.1 - MAKE CONNECTIONS Review the description of meiosis...Ch. 12.1 - WHAT IF? Propose a possible reason that the first...Ch. 12.2 - A white-eyed female Drosophila is mated with a...Ch. 12.2 - Neither Tim nor Rhoda has Duchenne muscular...Ch. 12.2 - MAKE CONNECTIONS Consider what you learned about...Ch. 12.3 - When two genes are located on the same chromosome,...Ch. 12.3 - For each type of offspring of the testcross in...Ch. 12.3 - WHAT IF? Genes A, B, and C are located on the same...Ch. 12.4 - About 5% of individuals with Down syndrome have a...
Ch. 12.4 - WHAT IF? The ABO blood type locus has been mapped...Ch. 12.4 - MAKE CONNECTIONS The gene that is activated on the...Ch. 12.4 - Women born with an extra X chromosome (XXX) are...Ch. 12 - A man with hemophilia (a recessive, sex-linked...Ch. 12 - Pseudohypertrophic muscular dystrophy is an...Ch. 12 - A space probe discovers a planet inhabited by...Ch. 12 - Using the information from problem 3, scientists...Ch. 12 - A man with red-green color blindness (a recessive,...Ch. 12 - You design Drosophila crosses to provide...Ch. 12 - A wild-type fruit fly (heterozygous for gray body...Ch. 12 - Assume that genes A and B are 50 map units apart...Ch. 12 - Prob. 9TYUCh. 12 - SCIENTIFIC INQUIRY DRAW IT Assume you are mapping...Ch. 12 - FOCUS ON EVOLUTION Crossing over is thought to be...Ch. 12 - FOCUS ON INFORMATION The continuity of life is...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE Butterflies have an X-Y...
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- Discuss Concepts One of the human chromosome pairs carries a gene that influences eye color. In an individual human, one chromosome of this pair has an allele of this gene that contributes to the formation of blue eyes. The other chromosome of the pair has an allele that contributes to brown eye color (other genes also influence eye color in humans). After meiosis in the cells of this individual, what fraction of the nuclei will carry the allele that contributes to blue eyes? To brown eyes?arrow_forwardAsaparrow_forwardHomologous 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…arrow_forward
- Nonearrow_forwardBackground 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_forwardconsider the metaphase (mitosis) chromosome spread of the following related animal species. The first meiotic division in the hybrid animal shows a mixture of paired and single chromosomes. Why do you suppose this occurs? Can you suggest a possible relationship between the mixed chromosomes and the observed sterility of the hybrid?arrow_forward
- #10: knowledge in geneticsarrow_forward37. Answer each question about this diagram: ZWKOI KEY %3D 13 22 1> This individual's sex is female [Choose ] trisomy 21 karyogram 2n 2> The genetic disorder revealed is triplo X 1n 3> This type of diagram is called a genetic map male polyploidy female 4> The ploidy number of this 46 individual is ancuploidy 5> The term to describe this disorder polyploidy as the incorrect pumber of to search :-arrow_forwardExamine Figure . What type of chromosome (metacentric, submetacentric, acrocentric, or telocentric) is chromosome 1? What about chromosome 4?arrow_forward
- Helparrow_forwardillustrate that the homologous chromosomes are still connected to each other even after the synaptonemal complexes and recombination nodules have dissolvedarrow_forwardHello, i understand the question, but i only need to know which option is right, no need for explanation. I mean jsut say which option, thanks in advance.arrow_forward
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