Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 31.1, Problem 2CC
WHAT IF? If a plant has the double mutation ctr and ein, what is its triple-response
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In roses, the synthesis of red pigment is by two steps ina pathway, as follows:colorless intermediate gene Pmagenta intermediate red pigment gene Qa. What would the phenotype be of a plant homozygousfor a null mutation of gene P?b. What would the phenotype be of a plant homozygousfor a null mutation of gene Q?c. What would the phenotype be of a plant homozygousfor null mutations of genes P and Q?d. Write the genotypes of the three strains in parts a, b,and c.e. What F2 ratio is expected from crossing plants fromparts a and b? (Assume independent assortment.)
- 1 attachment
If a pure line wheat plant with a colored kernel
(geniotype = DDEE) is crossed to plant with white
kernels (genotype = ddee) and the resulting.
F1 plants are selfed, a modification of the dihybrid
9:3:3:1 ratio will be produced. What is the
biochemical explanation for the genotypes:
(a) D_E_ and (b) D_ee ?
A. Presence of functional enzymes from both genotypes (a) and
(b)
B. Presence of functional enzymes from genes in (a)
C. Absence of a functional enzyme from the D gene pair
D. Presence of functional enzymes from genes in (a) and absence
of a functional enzyme from the D gene pair in (b)
E. None of the above.
a. draw the relevant plant chromosomes in both plants
b. explaint he two different ratios
Chapter 31 Solutions
Campbell Biology in Focus
Ch. 31.1 - Prob. 1CCCh. 31.1 - WHAT IF? If a plant has the double mutation ctr...Ch. 31.1 - Prob. 3CCCh. 31.2 - If an enzyme in field-grown soybean leaves is most...Ch. 31.2 - WHAT IF? If a plant flowers in a controlled...Ch. 31.2 - MAKE CONNECTIONS Plants detect the quality of...Ch. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CCCh. 31.3 - Prob. 3CCCh. 31.4 - Prob. 1CC
Ch. 31.4 - Chewing insects mechanically damage plants and...Ch. 31.4 - Prob. 3CCCh. 31 - The hormone that helps plants respond to drought...Ch. 31 - Prob. 2TYUCh. 31 - Prob. 3TYUCh. 31 - Prob. 4TYUCh. 31 - Prob. 5TYUCh. 31 - Prob. 6TYUCh. 31 - DRAW IT Indicate the response of Arabidopsis to...Ch. 31 - Prob. 8TYUCh. 31 - FOCUS ON EVOLUTION As a general rule,...Ch. 31 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 31 - Prob. 11TYU
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- . In a certain plant, the flower petals are normally purple.Two recessive mutations arise in separate plants and arefound to be on different chromosomes. Mutation 1 (m1)gives blue petals when homozygous (m1/m1). Mutation2 (m2) gives red petals when homozygous (m2/m2).Biochemists working on the synthesis of flower pigments in this species have already described the following pathway:colorless (white)compoundblue pigmentred pigmentenzyme Aenzyme Ba. Which mutant would you expect to be deficient inenzyme A activity?b. A plant has the genotype M1/m1 ; M2/m2. Whatwould you expect its phenotype to be?c. If the plant in part b is selfed, what colors of progenywould you expect and in what proportions?d. Why are these mutants recessive?arrow_forwardYou are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a mutagenesis screen to identify mutants in the photoperiod pathway. You conduct the screen and find two different plants that show the same mutant phenotype. You then use a complementation test. What is the predicted outcome of this test if both phenotypes are caused by mutations in separate genes? recover the wild type phenotype overexpress the gene O recover the mutant phenotypearrow_forwardthe photos below show flowers from two Arabidopsisplants. The plant on the left is wild-type (unmutated); theother carries a mutation that causes its flowers to havesepals and petals instead of stamens and carpels. Themutation inactivated one of the plant's ABC floral identity genes. Refer to Figure 10.8 and decide which gene(A, B, or C) has been inactivatedarrow_forward
- You are a developmental geneticist studying flowering time variation in Arabidopsis. You perform a mutagenesis screen to identify mutants in the photoperiod pathway. Given what you know about photoperiodism in Arabidopsis, what phenotype are you looking for and under what photoperiodic conditions would you perform the experiment? delayed flowering in long days delayed flowering in short days same flowering in short days early flowering in short days same flowering in long days early flowering in long daysarrow_forward11.11 please match thesearrow_forwardQ6. The bacterium Rhizobium radiobacter is well known to biologists because it has the rather astonishing ability to cause natural genetic engineering. That is, several genes are moved from the bacterial cells directly into the nucleus of cells of many higher plant species. Expression of these transferred genes in the infected plants stimulates cell division, creating a mass of undifferentiated tissue. Which of the following signals on these transferred genes could be recognized in the plant host cell but not in the original Rhizobium cell? “TATA” box transcription terminator hairpin loop intron splice signals SD box A. 1, 2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1, 2, 3 and 4arrow_forward
- True or false? wild type fast plants propagate mostly via self pollination transfected beta-galactosidase requires antibiotics to be expressed properly. the bradford assay allows you to determine the concentration of proteins produced fromtransfected DNAarrow_forwardhelparrow_forwardYou identify an auxotroph that doesn't grow in normal medium, but does grow in medium supplemented with Q, indicating that it has a defect in one or more enzymes in this pathway. This auxotroph is also able to grow if you supplement the medium with D. Does this data support the one gene-one enzyme hypothesis? a yes, because only one enzyme is disrupted by the mutation b yes, because only one enzyme in the pathway is functional in the mutant strain c no, because multiple enzymes in the pathway could be functional in the mutant strain d no, because multiple enzymes could be disrupted by the mutationarrow_forward
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