Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 15.3, Problem 2CC
VISUAL SKILLS Ø For each type of offspring of the test-cross in Figure 15.9, explain the relationship between its
Figure 15.9 Inquiry How does linkage between two genes affect inheritance of characters?
Expert Solution & Answer
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Select Cross
Ignore sex of flies
Include a test of hypothesis
Results for Cross #2
Phenotype
Observed
Proportion
4
0.0039
SV
509
0.4956
EY
506
0.4927
SV. EY
8
0.0078
Total
1027
1.0000
Add Results to Lab Notes
Below you will find a spreadsheet of the "class" data, use this to complete data table 2. Remember, the class is
a total of 24 students, to calculate frequency use the genotype with the highest frequency for each
characteristic and divide that number by 24. Don't forget to answer the question on the bottom of page 107!
Gender
Letters
XY
XX
Sex
X, Y
11
13
XX
Homozygous Heterozygous Homozygous
Recessive
Genotype
highest
frequency
Characteristic
Dominant
Aa
Eyebrows
Eye Shape
Hitchhikers
А, а
R, r
14
10
11
3
Rr
Hh
Н, h
D, d
Е, е
F,f
G, g
В, Ь
15
Earlobes
4
8.
12
dd
Ee
Tongue Roll
Widows Peak
7
10
13
Ff
Face Shape
9.
12
3
Gg
Eye Color
14
Bb
MacBook Air
esc
4)
FI
F2
F4
F5
F6
F8
F9
F10
F1I
F12
@
#
$
&
Gene mapping using the Three-point Testcross
a) Given the following alleles that control seed traits:W = wrinkled G = green R = roundw = smooth g = yellow r = oval
b) Results of a cross with a triple heterozygote revealed the following phenotypes:30 smooth yellow round4 smooth green round958 wrinkled green round2 wrinkled yellow oval18 wrinkled yellow round946 smooth yellow oval16 smooth green oval26 wrinkled green oval
c) Determine the order of the genes and the distance between them in centiMorgan (cM).Construct a gene map to show your results.
TIP: Based on the phenotypes, determine the alleles in the gametes
Chapter 15 Solutions
Campbell Biology
Ch. 15.1 - MAKE CONNECTIONS Review the description of...Ch. 15.1 - WHAT IF? Propose a possible reason that the first...Ch. 15.1 - Which one of Mendel's laws describes the...Ch. 15.2 - A white-eyed female Drosophila is mated with a...Ch. 15.2 - Neither Tim nor Rhoda has Duchenne muscular...Ch. 15.2 - MAKE CONNECTIONS Consider what you learned about...Ch. 15.3 - When two genes are located on the same chromosome,...Ch. 15.3 - VISUAL SKILLS For each type of offspring of the...Ch. 15.3 - Prob. 3CCCh. 15.4 - Prob. 1CC
Ch. 15.4 - Prob. 2CCCh. 15.4 - Prob. 3CCCh. 15.5 - Gene dosagethe number of copies of a gene that are...Ch. 15.5 - Reciprocal crosses between two primrose varieties,...Ch. 15.5 - WHAT IF? Mitochondrial genes are critical to the...Ch. 15 - What characteristic of the sex chromosomes allowed...Ch. 15 - Why are males affected by X-Iinked disorders much...Ch. 15 - Why are specific alleles of two distant genes more...Ch. 15 - Prob. 15.4CRCh. 15 - Explain how genomic imprinting and inheritance of...Ch. 15 - A man with hemophilia (a recessive, sex-linked...Ch. 15 - Pseudohypertrophic muscular dystrophy is an...Ch. 15 - Prob. 3TYUCh. 15 - A planet is inhabited by creatures that reproduce...Ch. 15 - Prob. 5TYUCh. 15 - A wild-type fruit fly (heterozygous for gray body...Ch. 15 - Assume that genes, A and B are on the same...Ch. 15 - Two genes of a flower, one Controlling blue (B)...Ch. 15 - Prob. 9TYUCh. 15 - Banana plants, which are triploid, are seedless...Ch. 15 - Prob. 11TYUCh. 15 - SCIENTIFIC INQUIRY DRAW IT Assume you are mapping...Ch. 15 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 15 - SYNTHESIZE YOUR KNOWLEDGE Butter flies have an X-Y...
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- select whcih ic correct When 2 wildtype alleles are on the same parental chromosome, this is known as [Combined or Coupling or dispersed or heterozygous or Repulsion] . In sharp contrast [Combined or Coupling or dispersed or heterozygous or Repulsion] is when 1 wildtype allele and 1 mutant allele are on the same parental chromosomearrow_forwardTick all the essential steps to demonstrate a genetic linkage between a disease and a molecular marker in humans. identify the alleles of the genetic marker only for diseased individuals in the pedigree enumerate parental type individuals sequence the wild-type and mutant alleles to find the mutation no correct answer calculate a Lod score calculate the recombination frequency between the mutation and the molecular marker identify the alleles of the genetic marker for each individual in the pedigree pedigree analysis cloning the defective gene enumerate recombinant individualsarrow_forwardSwitch Background P Immersive Reader 100% Page Width d. What percent of the offspring will be carriers of the white eye trait? 2. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. a. What are the genotypes of each parent? ic b. What fraction of the children will have red eyes? c. What fraction of the children will have white eyes? Pra d. What fraction of the female children will carry the white eyed trait?arrow_forward
- Bb Take Test: Mod 9 Lab - Genetic X + ← ] C G QUESTION 3 In the pedigree below, all shaded individuals express the gene in question. For example, Arlene "has" the trait, she displays the phenotype in question. For example, if we were following the inheritance pattern of a widow's peak, Arlene has a widow's peak (that is NOT the trait here, just an example). Unshaded individuals (blank circles and squares) do not manifest the trait in question, but their specific genotype is unknown - they could be heterozygous, homozygous dominant, or homozygous recessive. What is the mechanism of inheritance of this trait? Sandra Daniel recessive dominant Tom 990 Alan QUESTION 4 George Sam Tina Christopher Arlene Wilma Ann O Carla R Update Michael In the pedigree below, all shaded individuals express the gene in question. For example, Arlene "has" the trait, she displays the phenotype in question. For example, if we were following the inheritance pattern of a widow's peak, Arlen a widow's peak (that…arrow_forwardActivity 4 Identification of phenotype of known genotype The characteristic of the color of the red tomato fruit (R) is dominant over the characteristic of the yellow color (r) The characteristic of the color of white flowers (W) is dominant over the characteristic of the color of the yellow flowers (w), and the characteristic length of the stem of the plant (T) is dominant over the short characteristic (t) If a red fruit plant with yellow and long-stemmed flowers is crossed, with anotheryellow, white-flowered and short-stemmed plant, knowing that the dominant characteristic is pure. What is the phenotype of individuals of the resulting generation?arrow_forwardThis exercise primarily addresses o MLO 1: Correctly assign and interpret allele symbols according to the conventions of the fruit fly research community. o MLO 2: Correctly assign genotypes and phenotypes to parents and offspring in genetic crosses given a mode of inheritance. Autosomal Recessive Inheritance We learned in the Linkage Mapping lab module the conventions for representing alleles in fruit flies. Recall that we use one to three letters, and the case (upper or lower) is determined by whether the mutant allele is recessive or dominant. Additionally, we add a "+" as a superscript to indicate the wild-type ("normal") allele. For example, if a new mutant phenotype is recessive, we can represent the recessive allele as m. Then the wild-type allele is mt, and m+ > m. Based on the rule of dominance, we can predict phenotypes based on genotypes: mm Wild type Wild type Mutant m+m mmarrow_forward
- Activity E: Predicting the outcome of a dihybrid cross The resulting phenotypic ratios in the F₂ generation of a dihybrid cross (2 traits) can be quite different than those observed from a monohybrid cross, but the process is essentially the same. First, you list all possible gametes each parent and subsequent parents can produce. Second, you then assign the gametes to a Punnett square and fill it in. Finally, you count the progeny and determine the number of progeny in each phenotypic category. Remember, when determining the types of gametes possible, each gamete must have one member of each homologous pair of chromosomes. This means there needs to be one copy of every gene. For example, if you are considering a T gene (ability to taste PTC) and an F gene (let's say earwax texture- wet earwax is dominant and dry earwax is recessive), each gamete must have one allele for the T gene (either T or t) and one allele for the F gene (either For f).arrow_forwardTopic: Trihybrid Cross, Height in merigonias is determined by three unlinked genes that act additively. Each has two alleles, one compltely dominant allele(A,B or C) that makes plants taller and one recessive allele that makes plants shorter. Do the corss AaBbCc X AaBbCc. The F1 progenty: 27/64 will be as tall as the parents; 37/64 will be shorter than the parents. Pls explain it with more details. thanksarrow_forwardVISUALIZE Sketch 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_forward
- Genetics 181 Rule of Incomplete Dominance When two different pure-breeding strains are crossed, and their offspring show a blending of phenotypes, then neither allele is dominant. This is easily recognized when the phenotype is somewhere between two extremes. Counting the parents, there are three phenotypes (black, white, grey) being expressed in these flowers instead of only two, and that third phenotype is intermediate between the other two. This heterozygous condition is called incomplete dominance. 1. On the chart you did earlier, which of the three hair types (wavy, curly, or straight) represents incomplete dominance-the blended heterozygous condition? 2. You cross a herd of red cattle with white cattle and all of the calves appear to be roan (reddish white). Is this an example of incomplete dominance? How do you know? 3. You cross a blue flowering pea plant with a white flowering pea plant and all of the offspring are blue flowered. Is this an example of incomplete dominance? How…arrow_forwardTopic: Penetrance. Petal number is controlled by a single gene in merigonias. The gene has a completely dominant wild type allele F that makes a plant have five petals and a mutant recessive six petal allele(f). However the six petal trait is only 50% penetrant. You do the cross Ff x Ff. What fraction of the progeny do you have the 6 petals? what is the meaning for 50% penetrant.arrow_forwardTopic: Trihybrid Cross, Height in merigonias is determined by three unlinked genes that act additively. Each has two alleles, one compltely dominant allele(A,B or C) that makes plants taller and one recessive allele that makes plants shorter. Do the corss AaBbCc X AaBbCc. The fraction of The F1 progenty will be ? Pls explain it with more details. thanksarrow_forward
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