Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 39.2, Problem 2CC
WHAT IF? Ø If a plant has the double mutation err and 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.)
In roses, the synthesis of red pigment is produced by two steps in a pathway.
gene O
magenta intermediate -
gene P
colorless intermediate-
red pigment
What would the phenotype be of a plant homozygous for a null mutation of gene P?
What would the phenotype be of a plant homozygous for a null mutation of gene Q?
What would the phenotype be of a plant homozygous for null mutations of genes P and Q?
magenta
red
Match a genotype to each strain.
colorless
Strain
P locus Q locus
homozygous null mutation of gene P
homozygous null mutation of gene Q
homozygous null mutations of genes P and Q
Answer Bank
plp
PIP
What F2 ratio is expected from crossing a plant that is homozygous for a null mutation of gene P with a plant that is
homozygous for a null mutation of gene Q? Assume independent assortment.
9 colorless : 4 magenta : 3 red
9 red : 4 colorless : 3 magenta
O 9 red : 4 magenta : 3 colorless
A mutation that breaks which of the following genes would be most likely to produce theanthocyanless phenotype of the green-stem Wisconsin Fast Plants (meaning no purple stems):PAL, CHS, C3H, FLS, or DFR? Explain your reasoning.
Chapter 39 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 39.1 - What are the morphological differences between...Ch. 39.1 - Cycloheximide is a drug that inhibits protein...Ch. 39.1 - Prob. 3CCCh. 39.2 - Prob. 1CCCh. 39.2 - WHAT IF? If a plant has the double mutation err...Ch. 39.2 - Prob. 3CCCh. 39.3 - If an enzyme in field-grown soybean leaves is most...Ch. 39.3 - WHAT IF? If a plant flowers in a controlled...Ch. 39.3 - MAKE CONNECTIONS Plants detect the quality of...Ch. 39.4 - Prob. 1CC
Ch. 39.4 - Prob. 2CCCh. 39.4 - Prob. 3CCCh. 39.5 - What are some drawbacks of spraying fields with...Ch. 39.5 - Chewing insects mechanically damage plants and...Ch. 39.5 - Many fungal pathogens get food by causing plant...Ch. 39.5 - WHAT IF? Suppose a scientist finds that a...Ch. 39 - What are two common ways by which signal...Ch. 39 - Is there any truth to the old adage, "One bad...Ch. 39 - Why did plant physiologists propose the existence...Ch. 39 - Plants that have acclimated to drought stress are...Ch. 39 - Prob. 39.5CRCh. 39 - Prob. 1TYUCh. 39 - Prob. 2TYUCh. 39 - Prob. 3TYUCh. 39 - How may a plant respond to severe heat stress? (A)...Ch. 39 - Level 2: Application/Analysis 5. The signaling...Ch. 39 - If a long-day plant has a critical night length of...Ch. 39 - Prob. 7TYUCh. 39 - DRAW IT Indicate the response to each condition by...Ch. 39 - Level 3: Synthesis/Evaluation 9. EVOLUTION...Ch. 39 - SCIENTIFIC INQUIRY A plant biologist observed a...Ch. 39 - SCIENCE. TECHNOLOGY, AND SOCIETY Describe how our...Ch. 39 - Prob. 12TYUCh. 39 - Prob. 13TYU
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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
- Would you simply answer the question for me, i saw many answers for it but still not sure. The flower color of genetically identical hemp plants (clones) is purple when the flowers develop under cold environment (30 °C). Describe in detail a molecular mechanism that could explain how these two groups of genetically identical plants differ in their gene expressions to produce different flower colors?arrow_forward11.11 please match thesearrow_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_forward
- What is mutation? Explain the significance of mutation in plant breeding. Give an example of a disease resistant variety of cultivated plant induced by mutation.arrow_forward. 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_forwardCan you answer part a-c if its true or false a) the AP3 and PI show auto- and cross-regulatory interactions, as well as they form obligate heterodimers to carry out the B class gene function. Therefore, if there is no PI expression, AP3 expression alone is not sufficient for establishing the petal and stamen identities. b) Angiosperm is a group of plants whose seeds are borne within a mature ovary (fruit). c) The organ in different organisms under every variety of forms and functions due to evolutionary development from the same or a corresponding part in a common ancestor is homologous.arrow_forward
- the 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_forwardWhat would be the effect on flowering time of over-expressing VIN3 (i.e., 35S:VIN3) in a winter annual Arabidopsis plant grown adjacent to a summer annual wild type plant in long days under warm conditions? Assume that the plants germinate at the same time. In answering the question, describe the molecular mechanism that allows you to make this conclusion.arrow_forward4. (a) Please fill out the following table to describe the classic floral phenotypes of A, B, and C class homeotic mutants. The organ identities of the four whorls in a wild type Arabidopsis flower are filled out for you. Please fill out the rest of the table to indicate the organ identities in different whorls of the mutant flowers. ( Whorl 1 Whorl 2 Whorl 3 Whorl 4 Wild type sepals petals stamens carpels A class gene mutants B class gene mutants C class gene mutantsarrow_forward
- Can you answer both questions please (b) Based on the ABC model, what would be the predicted phenotype of a double AB mutant? (c) In developing flowers of dioecious Spinach and Thalictrum, stamens are not developed in female flowers, and carpels are not developed in male flowers. What is the simplest model of ABC class gene expression that might explain this?arrow_forwardExamine the variegated leaf shown in Figure Q14–3.Yellow patches surrounded by green are common, butthere are no green patches surrounded by yellow. Proposean explanation for this phenomenon.arrow_forwardHeterosis has played a key role in productivity enhancement in crop species. As a plant breeder, comment on the performance of hybrids versus OPVs in sunflower and brassica. Also suggest when OPVs are used and why?arrow_forward
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