BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 40, Problem 3A
In Iowa, a company called Team Corn works to ensure that fields of seed com outcross so that hybrid vigor can be maintained They do this by removing the staminate (that h, pollen-producing) flowcrs from the corn plants In an attempt to put Team Corn out of business, you would like to develop genetically engineered corn plants that
a contain Z genes to prevent germination of pollen on the sitgmatic surface.
b contain.S genes to stop pollen tube growih during sclf-fertlization.
c express B-typc homeooc genes throughout developing flowers.
d. express A-typc homeotie genes throughout developing flowers.
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DIHYBRID CROSS1. ) Consider the possibility that your observational data are of plantsresulting from a dihybrid cross, where the previous generation were heterozygousfor both traits (RrSs x RrSs). Create a Punnett square for this cross and presentthe expected phenotypic ratio.2.) Present your results in a table as dihybrids and determine the observedphenotypic ratio of purple/smooth to purple/shrunken to yellow/smooth toyellow/shrunken. Consider the plant as a whole rather than the individual cobs.
Chapter 40 Solutions
BIOLOGY
Ch. 40.1 - Prob. 1LOCh. 40.1 - Prob. 2LOCh. 40.1 - Prob. 3LOCh. 40.2 - Name the four genetically regulated flowering...Ch. 40.2 - Define floral determination.Ch. 40.2 - Prob. 3LOCh. 40.3 - Prob. 1LOCh. 40.3 - Prob. 2LOCh. 40.3 - Prob. 3LOCh. 40.4 - Prob. 1LO
Ch. 40.4 - Prob. 2LOCh. 40.4 - Prob. 3LOCh. 40.5 - Prob. 1LOCh. 40.5 - Prob. 2LOCh. 40.5 - Prob. 3LOCh. 40.6 - Prob. 1LOCh. 40.6 - Prob. 2LOCh. 40.7 - Prob. 1LOCh. 40.7 - Prob. 2LOCh. 40.7 - Prob. 3LOCh. 40.8 - Prob. 1LOCh. 40.8 - Prob. 2LOCh. 40.8 - Prob. 3LOCh. 40 - Prob. 1DACh. 40 - Prob. 1IQCh. 40 - Prob. 2IQCh. 40 - Prob. 3IQCh. 40 - Morphogenesis is the development of a. growth...Ch. 40 - Vernalization induces flowering following exposure...Ch. 40 - Prob. 3UCh. 40 - Which of the following is NOT a component of a...Ch. 40 - Megasporcs are produced in a. anthers by mitosis....Ch. 40 - A stamen contains a a. style. b. stigma. c....Ch. 40 - Unlike bee-pollinated flowers, bird-pollinated...Ch. 40 - Prob. 8UCh. 40 - Endosperm is produced by the union of a. a central...Ch. 40 - During the globular stage of embryo development,...Ch. 40 - Which of the following is NOT a primary meristem?...Ch. 40 - Prob. 12UCh. 40 - The shoot tip of an emerging maize seedling is...Ch. 40 - Asexual reproduction is likely to be most common...Ch. 40 - Prob. 15UCh. 40 - Prob. 16UCh. 40 - Prob. 17UCh. 40 - Prob. 1ACh. 40 - Your roommate is taking biology with you this...Ch. 40 - In Iowa, a company called Team Corn works to...Ch. 40 - Prob. 4ACh. 40 - One of the most notable differences between gamete...Ch. 40 - A plant lacking the WOODEN LEG gene will likely a....Ch. 40 - How would plant development change if the...Ch. 40 - Prob. 8ACh. 40 - Loss-of-function mutations in the suspensor gene...Ch. 40 - Prob. 1SCh. 40 - If you live in a north temperate region, explain...Ch. 40 - In wild columbine flower morphology encourages...Ch. 40 - In most part of the world, commercial potato crops...Ch. 40 - Design an experiment to determine whether light or...
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- The monopteros mutant (a) lacks a primary root (b) develops normally until the plant becomes reproductive (c) has abnormal leaf morphogenesis (d) was discovered in rice after its genome was sequenced (e) is one of only two developmental mutants known in Arabidopsis.arrow_forwardIn flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microsporesarrow_forwardА D If the auxin concentration in A is 46 units and the auxin concentration in B is 33 units then the auxin concentration is C is unitsarrow_forward
- Under which of the following conditions would pollen from an S2S5 plant successfully pollinate an S1S5 flower? a. Using pollen from a carpelate flower to fertilize a staminate flower would be successful. b. If the plants used gametophytic self-incompatibility, half of the pollen would be successful. c. If the plants used sporophytic self-incompatibility, half of the pollen would be successful. d. Pollen from an S2S5 plant can never pollinate an S1S5 flower.arrow_forwardIn most parts of the world, commercial potato crops are producedasexually by planting tubers. However, in some regions, such asSoutheast Asia and the Andes, some potatoes are grown from trueseeds. Discuss the advantages and disadvantages of growingpotatoes from true seeds.arrow_forwardPlants reproduce through various methods. Explain which method helps to create genetic variability in crop plants? Moreover elaborate mechanisms promoting self or cross pollination.arrow_forward
- There is a possibility that gene flow due to cross-pollination may occur between crop plants genetically modified to be herbicide resistant and neighboring wild plants. Why would this be a problem?arrow_forwardBolting is when a plant starts to spend its energy on producing flowers. Initial bolting time is figured by the number of days from germination to bolting. Rosette area is figured by the average rosette area of the plant at the time of bolting. Researchers created strains of A. thaliana to have varying somatic ploidy levels to study the resulting phenotypes. The graphs show how initial bolting time and rosette area relate to the number of chromosomes in each strain’s somatic cells. Which of the following best describes how a change in genotype affects the phenotype of A. thaliana? The largest average change in both phenotypes occurred from the 2n to the 4n strain. The largest average change in both phenotypes occurred from the 4n to the 6n strain. A lesser number of chromosomes results in plants with a later initial bolting time. A greater number of chromosomes results in plants that have larger rosettes areas.arrow_forwardWhich option is the main reason why apple trees are propagated asexually? asexually propagated apple trees are more disease resistant more than one of these is the reason why apple trees are asexually propagated the process is much easier than growing them from seeds asexual propagation introduces genetic variation that makes the trees hardier it is the only way to grow the same reliable quality of applearrow_forward
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