Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20, Problem 6P
A dominant mutation in Drosophila called Delta causes changes in wing morphology in Delta / + heterozygotes. Homozygosity for this mutation (Delta / Delta) is lethal. In a population of 150 flies, it was determined that 60 had normal wings and 90 had abnormal wings.
| a. | What are the allele frequencies in this population? |
| b. | Using the allele frequencies calculated in part (a), how many total zygotes must be produced by this population in order for you to count 160 viable adults in the next generation? |
| c. | Given that there is random mating, no migration, and no mutation, and ignoring the effects of genetic drift, what are the expected numbers of the different genotypes in the next generation if 160 viable offspring of the population in part (a) are counted? |
| d. | Is this next generation at Hardy-Weinberg equilibrium? Why or why not? |
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QUESTION 3
The table below shows the results of an investigation in which the effect of
temperature and light on the yield of tomatoes in two greenhouses on a farm
was investigated.
TEMPERATURE
(°C)
AVERAGE YIELD OF TOMATOES PER
3.1
PLANT
(kg)
LOW LIGHT LEVELS
HIGH LIGHT LEVELS
5
0,5
0,5
10
1,5
2,5
15
3,0
5,0
20
3,6
8,5
25
3,5
7,8
30
2,5
6,2
State TWO steps the investigator may have taken into
consideration during the planning stage of the investigation.
(2)
3.2
Identify the:
a) Independent variables
(2)
b) Dependent variable
(1)
3.3
Plot a line graph showing the results of the average yield of the
tomatoes from 5°C to 30°C for low light levels.
(6)
3.4
State ONE way in which the scientists could have improved the…
Explain why you chose this mutation. Begin by transcribing and translating BOTH the
normal and abnormal DNA sequences. The genetic code below is for your reference.
SECOND BASE OF CODON
כ
FIRST BASE OF CODON
O
THIRD BASE OF CODON
SCAGUCAGUGAGUCAG
UUU
UUC
UCU
UAU
UGU
Phenylalanine
(F)
Tyrosine (Y)
Cysteine (C)
UCC
UAC
UGC
Serine (S)
UUA
UUG
Leucine (L)
UCA
UCG_
UAA
UGA
Stop codon
-Stop codon
UAG
UGG -Tryptophan (W)
CUU
CUC
CCU
CAU
CGU
Histidine (H)
CCC
CAC
CGC
-Leucine (L)
Proline (P)
CUA
CCA
CAA
CUG
CCG
CAG-Glutamine (Q)
-Arginine (R)
CGA
CGG
AUU
ACU
AAU
AGU
AUC
Isoleucine (1)
Asparagine (N)
ACC
AAC
Threonine (T)
AUA
ACA
AAA
Methionine (M)
Lysine (K)
AUG
ACG
Start codon
AAG
AGC-Serine (S)
-Arginine (R)
AGA
AGG
GUU
GCU
GAU
GUC
GUA
GUG
GCC
Valine (V)
-Alanine (A)
GCA
GCG
GAC
GAA
GAG
Aspartic acid
(D)
GGU
Glutamic acid
(E)
GGC
GGA
GGG
Glycine (G)
In order to provide a complete answer to the question stated above, fill in the mRNA bases
and amino acid sequences by using the Genetic Code…
identify the indicated cell in white arrow
Chapter 20 Solutions
Genetics: From Genes to Genomes, 5th edition
Ch. 20 - Choose the best matching phrase in the right...Ch. 20 - When an allele is dominant, why does it not always...Ch. 20 - A population with an allele frequency p of 0.5 and...Ch. 20 - Prob. 4PCh. 20 - Which of the following populations are at...Ch. 20 - A dominant mutation in Drosophila called Delta...Ch. 20 - A large, random mating population is started with...Ch. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Two hypothetical lizard populations found on...
Ch. 20 - It is the year 1998, and the men and women sailors...Ch. 20 - Prob. 12PCh. 20 - In 1927, the ophthalmologist George Waaler tested...Ch. 20 - Prob. 14PCh. 20 - A gene has two alleles A frequency = p and a...Ch. 20 - Some people can taste the bitter compound...Ch. 20 - Androgenetic alopecia pattern baldness is a...Ch. 20 - Why is the elimination of a fully recessive...Ch. 20 - Tristan da Cunha is a group of small islands in...Ch. 20 - Small population size causes genetic drift because...Ch. 20 - Prob. 21PCh. 20 - A mouse mutation with incomplete dominance t =...Ch. 20 - In Drosophila, the vestigial wings recessive...Ch. 20 - Prob. 24PCh. 20 - You have identified an autosomal gene that...Ch. 20 - In Europe, the frequency of the CF allele causing...Ch. 20 - An allele of the G6PD gene acts in a recessive...Ch. 20 - Explain why evolutionary biologists monitor...Ch. 20 - What is the most straightforward evidence at the...Ch. 20 - In March 2013, the American Journal of Human...Ch. 20 - If you go back 40 generations into your biological...Ch. 20 - In Fig. 21.17, to what part of the world does...Ch. 20 - Predict the DNA sequences at the four nodes...Ch. 20 - A cladogram not drawn to scale for the taxonomic...Ch. 20 - As noted in Fig. 21.22, humans now living in...
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