Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 15, Problem 7TYK
Summary Introduction
Introduction: Locus is the specific location of a gene in a chromosome. The inheritance of two different characters is affected by the gene linkage. The production of the offspring with traits that are combined is studied in recombination. Map units measure genetic linkage.
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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 females
During a dihybrid cross involving two linked genes (two-point testcross), 20 flies showed recombinant phenotypes, whereas 480 flies showed the parental phenotypes. How far apart are these linked genes from each other?
a. 20 cM
b. 7.5 cM
c. 4 cM
d. 0.04 cM
e. 8 cM
As a biologist, you complete a test cross between fly offspring to gain information about how two genes interact. You find that 20% of these test cross offspring are parental types and 80% are recombinant types. Which of the following is true based on these results?
a.
The alleles of the genes in question did not go through independent assortment
b.
The genes in question are likely located on different chromosomes
c.
There is a 100% frequency of recombination in this test cross
d.
Most of the test cross offspring look like their parents
Chapter 15 Solutions
Study Guide for Campbell Biology
Ch. 15 - Complete the following summary of Morgans crosses...Ch. 15 - Two normal color-sighted individuals have two...Ch. 15 - In a testcross between a heterozygote tall,...Ch. 15 - With unlinked genes, an equal number of parental...Ch. 15 - The following recombination frequencies have been...Ch. 15 - a. What is the difference between an organism with...Ch. 15 - Prob. 7IQCh. 15 - Prob. 8IQCh. 15 - Mendels law of independent assortment applies to...Ch. 15 - You have found a new mutant phenotype in fruit...
Ch. 15 - Prob. 3SYKCh. 15 - Prob. 4SYKCh. 15 - Thomas Hunt Morgan firmly established the location...Ch. 15 - Prob. 2TYKCh. 15 - Sex-linked traits a. are coded for by genes...Ch. 15 - Prob. 4TYKCh. 15 - Prob. 5TYKCh. 15 - Prob. 6TYKCh. 15 - Prob. 7TYKCh. 15 - Prob. 8TYKCh. 15 - Prob. 9TYKCh. 15 - Prob. 10TYKCh. 15 - Consider three genes on the X chromosome: A, B,...Ch. 15 - Prob. 12TYKCh. 15 - Genomic imprinting a. explains cases in which the...Ch. 15 - Prob. 14TYKCh. 15 - Prob. 15TYKCh. 15 - Suppose that alleles for an X-linked character for...Ch. 15 - Some girls who fail to undergo puberty are found...Ch. 15 - Prob. 18TYKCh. 15 - The genetic event that results in Turner syndrome...Ch. 15 - Prob. 20TYKCh. 15 - Prob. 1GPCh. 15 - Prob. 2GPCh. 15 - Prob. 3GPCh. 15 - Prob. 4GPCh. 15 - Prob. 5GPCh. 15 - Red-green color blindness is caused by a...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Let us suppose that two long-winged flies were crossed and that 77 long-winged and 24 short-winged specimens were counted in the offspring. a. Will the short-winged character be dominant or recessive?B. What will the genotypes of the parents be?C. What is the observed genotype ratio?arrow_forwardA gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles? Choose 1 answer: A. Genetic recombination B. Codominance C. Incomplete dominance D.Chimerismarrow_forwardIn the previous question (see text below if unsure) what is the frequency of the different genotypes? You cross organisms with genotypes AaBb to one another (i.e. AaBb X AaBb). What are the genotypes of gametes that these individuals can produce? Group of answer choices A. heterozygous ones are more common B. all are produced in equal numbrers C. recessive ones are more common D. dominant ones are more commonarrow_forward
- A true breeding plant that produces elongated fruits is crossed to a true breeding plant that produces round fruits. The offspring of this cross all have oval-shaped fruit. Which of the following is true? A. This involves two genes, one that controls the length of the fruit and one that controls the width. B. This long allele is epistatic over the short allele. C. The long allele is dominant over the short allele. D. The long allele is incompletely dominant over the short allele.arrow_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_forwardWhich of the following statements accurately represents the difference between a gene and a locus? a. A gene is dominant, and a locus is recessive. b. A locus and a gene are essentially the same - there is no difference. c. A locus occurs in diploid cells, and a gene occurs in a haploid cell. d. A locus is a phenotype and a gene is a genotype.arrow_forward
- CC DD and cc dd individuals were crossed to eachother, and the F1 generation was backcrossed to thecc dd parent. 997 Cc Dd, 999 cc dd, 1 Cc dd, and 3 ccDd offspring resulted.a. How far apart are the c and d loci?b. What progeny and in what frequencies would youexpect to result from testcrossing the F1 generationfrom a CC dd × cc DD cross to cc dd?c. In a typical meiosis, how many crossovers occurbetween genes C and D?d. Assume that the C and D loci are on the samechromosome, but the offspring from the testcrossdescribed in part (b) were 498 Cc Dd, 502 cc dd,504 Cc dd, and 496 cc Dd. How would your answer to part (c) change?arrow_forwardThe Yellow Fever mosquito has 2N number of 6 chromosomes and a Yellow dung fly has 2N number of 12 chromosomes, assuming that crossing over did not happen. Which of the following statement/s is/are correct? Select one: a. Independent assortment and random fertilization will have no impact on the genetic diversity of zygotes b. The genetic diversity among offspring will be same in Yellow dung fly and Yellow fever mosquito c The genetic diversity among offspring will be higher in Yellow dung fly compared to Yellow fever mosquito d. No genetic diversity will be produced among offspring in the two species e. Random fertilization can reduce the genetic diversity of zygotes in Yellow fever mosquitoarrow_forwardSTRUCTURES AND FUNCTIONS Write the possible genotypes of the offspring in the Punnett square below. Then answer the questions in the spaces provided. Q = green q = yellow T = smooth t = wrinkled a. Does the Puninett square represent a monohybrid cross or a dihybrid cross? How do you know? b. List the phenotype.of the parents. C. Give the phenotypic ratio predicted by the Punnett square for the cross.arrow_forward
- What gametes are produced by the following organisms: a. Genotype YyRr, if Y and R are on different chromosomes b. Genotype YyRr, if dominant Y and R are on the same chromosome, no crossing over c. Genotype YyRr, if dominant Y and recessive r are on the same chromosome, no crossing over d. Genotype YyRr, if dominant Y and R are on the same chromosome, 50% crossing over e. What is the genotype of the F1 generation if parents RRyy and rrYY are crossed, R and y are located on the same chromosome, no crossing over.arrow_forwardIn tomatoes, red fruit (R) is dominant over yellow fruit (r). Five generations of red tomato plants were crossed to each other without producing any yellow tomato plants. It can be hypothesized that the red tomato plant must be Select one: a. Homozygous b. Recessive c. Dominant d. Heterozygousarrow_forwardConsider the quadhybrid cross (four genes) below: What is the probability of obtaining offspring with the genotype AaBBccDd? O a. Zero (0) O b. 1/32 (or 0.031) O c. 1/16 (or 0.063) O d. 1/4 (or 0.25) O e. 3/8 (or 0.375) AaBbCcDd x AaBBCcDDarrow_forward
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