Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3, Problem 25P
Suppose the intermediate called Colorless precursor 2 in the pathway shown in Fig. 3.16 was blue instead of colorless.
| a. | What would be the |
| b. | Describe the type of genetic interaction that corresponds to this new phenotypic ratio. |
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The Neurospora octad shown came from a
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a. Is this an MI or an MIl octad or neither?
Explain.
b. Diagram the production of this octad.
c. Is it possible to observe evidence of
heteroduplex formation in a Neurospora
ascus even if gene conversion did not occur
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You generate mutants in the metabolic pathway for starlase. You conduct some complementation
tests (after testing for dominance of course) and come up with the following results:
1
2
4
6
1
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a. How many complementation groups are there? [Select]
b. You conduct some additional experiments to elucidate the starlase metabolic pathway. Your
results are shown below. Use this information alongside information from the complementation
table above to place the intermediates in the correct order on the pathway. (HINT: use the
complementation groups from the table above to help you consolidate information on the tables
below. Reference practice question 3 from today's lecture for help).
Addition to minimal medium
Mutant
None
starlase
P
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Precursor -->
[ Select ]
[ Select ]
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--> starlase
c. Mutant 4 has a loss-of-function mutation for which enzyme in the starlase synthesis pathway?
[ Select ]
E1
E2
ЕЗ
Е4
Precursor > Intermediate 1→ Intermediate…
In sweet peas, the synthesis of purple anthocyanin pigment in the petals is controlled by two genes, B and D.The pathway iswhiteintermediateblueintermediateanthocyanin(purple)gene Benzymegene Denzymea. What color petals would you expect in a purebreeding plant unable to catalyze the first reaction?b. What color petals would you expect in a purebreeding plant unable to catalyze the second reaction?c. If the plants in parts a and b are crossed, what colorpetals will the F1 plants have?d. What ratio of purple : blue :white plants would youexpect in the F2?
Chapter 3 Solutions
Genetics: From Genes to Genomes
Ch. 3 - For each of the terms in the left column, choose...Ch. 3 - In four-oclocks, the allele for red flowers is...Ch. 3 - The Aa heterozygous snapdragons in Fig. 3.3 are...Ch. 3 - Recall from Chapter 2 Fig. 2.20 that Mendels R...Ch. 3 - In the fruit fly Drosophila melanogaster, very...Ch. 3 - A cross between two plants that both have yellow...Ch. 3 - In radishes, color and shape are each controlled...Ch. 3 - A wild legume with white flowers and long pods is...Ch. 3 - Assuming no involvement of the Bombay phenotype in...Ch. 3 - Several genes in humans in addition to the ABO...
Ch. 3 - Alleles of the gene that determines seed coat...Ch. 3 - One of your fellow students tells you that there...Ch. 3 - In a population of rabbits, you find three...Ch. 3 - In clover plants, the pattern on the leaves is...Ch. 3 - Fruit flies with one allele for curly wings Cy and...Ch. 3 - In certain plant species such as tomatoes and...Ch. 3 - In a species of tropical fish, a colorful orange...Ch. 3 - People heterozygous for normal and nonfunctional...Ch. 3 - Using old Fugate family Bibles and the Perry...Ch. 3 - A rooster with a particular comb morphology called...Ch. 3 - A black mare was crossed to a chestnut stallion...Ch. 3 - Filled-in symbols in the pedigree that follows...Ch. 3 - You perform a cross between two true-breeding...Ch. 3 - a. How would you describe inheritance of flower...Ch. 3 - Suppose the intermediate called Colorless...Ch. 3 - Explain the difference between epistasis and...Ch. 3 - The dominant allele H reduces the number of body...Ch. 3 - Secretors genotypes SS and Ss secrete their A and...Ch. 3 - Normally, wild violets have yellow petals with...Ch. 3 - A woman who is blood type B has a child whose...Ch. 3 - The following table shows the responses of blood...Ch. 3 - Three different pure-breeding strains of corn that...Ch. 3 - In mice, the AY allele of the agouti gene is a...Ch. 3 - A student whose hobby was fishing pulled a very...Ch. 3 - Suppose that blue flower color in a plant species...Ch. 3 - This problem examines possible biochemical...Ch. 3 - Considering your answers to Problem 36, does the...Ch. 3 - You picked up two mice one female and one male...Ch. 3 - Figure 3.21 and Fig. 3.28b both show traits that...Ch. 3 - Three genes in fruit flies affect a particular...Ch. 3 - The garden flower Salpiglossis sinuata painted...Ch. 3 - In foxgloves, three different petal phenotypes...Ch. 3 - In a culture of fruit flies, matings between any...Ch. 3 - Prob. 44PCh. 3 - A couple wants to know the probability that their...Ch. 3 - This problem illustrates why classical geneticists...Ch. 3 - Prob. 47PCh. 3 - Familial hypercholesterolemia FH is an inherited...Ch. 3 - You have come into contact with two unrelated...Ch. 3 - Polycystic kidney disease is a dominant trait that...Ch. 3 - Identical monozygotic twins have similar, but not...Ch. 3 - Using each of the seven coat color genes discussed...
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