Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 30, Problem 14TYK
Design an Experiment Experiments on the orange bread mold Neurosporacrassa, an ascomycete, were pivotal in elucidating the concept that each gene encodes a single enzyme. As N. crassa ascospores arise through meiosis and then mitosis in an ascus, each ascospore occupies a particular position in the final string of eight spores the ascus contains:
This quirk of ascospore development was extremely useful to early geneticists, because it vastly simplified the task of figuring out which alleles ended up in particular ascospores following meiosis. Recalling genetics topics discussed in Chapter 11, why was the analysis easier?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid:
a. Between which two stages of the Neurospora life cycle do most mitotic cell divisions occur?
b. Neurospora has an arginine amino acid synthesis pathway shown below:
Suppose I have a neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning.
c. Suppose I take the strain above that only grows with arginine supplements and cross it to a different mutant Neurospora strain that grows with arginine and citrulline supplements but not ornithine supplements. Assming genes A, B and C are unlinked and there is only one mutation per strain:
i) What percentage of the progeny will grow on ornithine?
ii) What percentage on citrulline?
iii) What percentage on arginine?
Show your work for i), ii) and iii). [Can be answered in less…
A pollen of maize with nuclei labeled P, Q and R fertilized an embryo sac with nuclei labeled S, T, U, V,
W, X, Y and Z as shown here.
R
V
Y
Synergids
U
W
P
Tube nucleus
Antipodals
Which of the following combinations could be found in the embryo?
i)
PQR, ii) QRY, iii) VWQ, iv) RY
Which of the above combinations could be found in the aleurone layer of the seed?
Which of the above combinations could be found in the germinating pollen tube?
Mention four reason why drosophilla was chossen by morgan for his experiment in genetics?
Chapter 30 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 30.1 - Prob. 1SBCh. 30.1 - Prob. 2SBCh. 30.1 - Prob. 3SBCh. 30.2 - Prob. 1SBCh. 30.2 - Prob. 2SBCh. 30.3 - Prob. 1SBCh. 30.3 - Prob. 2SBCh. 30.4 - Prob. 1SBCh. 30.4 - Prob. 2SBCh. 30 - Prob. 1TYK
Ch. 30 - Prob. 2TYKCh. 30 - Prob. 3TYKCh. 30 - Prob. 4TYKCh. 30 - Prob. 5TYKCh. 30 - A mushroom is: a. the food-absorbing region of an...Ch. 30 - Prob. 7TYKCh. 30 - Prob. 8TYKCh. 30 - Prob. 9TYKCh. 30 - In a college greenhouse, a new employee observes...Ch. 30 - Prob. 11TYKCh. 30 - Prob. 12TYKCh. 30 - Prob. 13TYKCh. 30 - Design an Experiment Experiments on the orange...Ch. 30 - Prob. 15TYKCh. 30 - Prob. 1ITDCh. 30 - Prob. 2ITD
Knowledge Booster
Learn more about
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
- Alternation of generations means -One phase of the life cycle is photosynthetic and the other is heterotrophic. -One phase of the life cycle is unicellular and the other is multicellular. -One phase of the life cycle takes place on land and the other in water. -One phase of the life cycle is multicellular diploid and the other is multicellular haploid. -One phase of the life cycle is motile and the other is stationary.arrow_forwardExperiment: Saccharomyces cerevisiae can exist stably in either a haploid or a diploid state. A haploid S. cerevisiae cell has 16 chromosomes. When certain haploids come into contact, they fuse their cell walls and membranes, followed by the fusion of their nuclear membranes. The single nucleus now has 32 chromosomes, 16 from each parent strain, and is thus a diploid. Haploid yeast strains divide mitotically to give rise to haploid progeny, and diploid strains divide mitotically to give rise to diploid progeny. Certain haploids can fuse to form diploids. Haploid S. cerevisiae exists in two "mating types," called a and a. Mating occurs only between a and a cells; no mating occurs between cells of identical mating type. We have a collection of eight a haploid mutant strains and eight a haploid mutant strains of yeast unable to synthesize tryptophan (trp). These will be combined (mated) in all possible combinations to yield diploid strains. If the diploids can grow on minimal medium,…arrow_forwardThe figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid. Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I have a Neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning.arrow_forward
- no need to explain just need to know if its a,b c, or d 1.) Alternation of generation refers to the alternation of diploid and haploid generation. What is the difference between the alternation of generation in moss and pine? a.) In moss, gametophyte is dominant; whereas, in pine, sporophyte is dominant. b.) In moss, sporophyte is dominant; whereas, in pine, gametophyte is dominant. c.) In moss, gametophyte is dependent on sporophyte; whereas, in pine, sporophyte is dependent on gametophyte. d.) In moss, meiosis occurs during gamete formation; whereas, in pine, it occurs in zygote formation. 2.) Meiosis involves two phases, meiosis I and meiosis II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic division of the primary spermatocyte results in two secondary spermatocytes. .What is the result of the first meiotic division of the primary oocyte? a.) two secondary oocytes b.) two polar bodies c.) two ovum d.) one secondary oocyte and…arrow_forward8) The diagram below represents a yeast cell that is in the process of budding, a form of asexual reproduction. Nucleus -Bud "Nucleus Which of the following statements describes the outcome of this process? A) The two cells that result will each contain half the species number of chromosomes. B) The two cells that result will have identical DNA. C) The bud will develop into a zygote. D) The bud will start to divide by the process of meiotic cell division.arrow_forwardno need to explain just need to know if its a,b,c or d 1.) The life cycles of some plants contains two alternating generations of adults. The diploid adult is called the sporophyte generation and the haploid adult is the gametophyte generation. The diploid plants of the sporophyte generations produce spores by the process of: a.) amitosis b.) meiosis c.) mitosis d.) binary fission 2.) A scientist was examining a human cell with 22 pairs of autosomes, an X chromosome and a Y chromosome. What conclusions can we drawn about the cell? a.) It is a somatic, diploid and male cell. b.) It is a somatic, diploid and female cell. c.) It is a gametic, haploid and male cell. d.) It is a gametic, diploid and male cell. 3.) What will be the number of chromosomes in Turner’s syndrome and Klinefelter's syndrome of an organism whose haploid number is 20? a.) 39 in Turner’s syndrome and 41 in Klinefelter’s syndrome b.) 41 in Turner’s syndrome and 39 in Klinefelter’s syndrome c.) 19 in Turner’s…arrow_forward
- Based on the entire “image”, what do you notice about the distribution and clustering of the yeast compared to human compared to plant Rab proteins? (At least mention 3 points).arrow_forwardThe figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid. b) Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I take the strain above that only grows with arginine supplements and cross it to a different mutant Neurospora strain that grows with arginine and citrulline supplements but not with ornithine supplements. Assuming gens A, B, and C are unlinked and there is only one mutation per stain: What percentage of the progeny will grow on ornithine? What percentage on citrulline? What percentage on arginine?arrow_forwardEXPERIMENT : INDUCTION OF CALLUS SOMATIC EMBRYOGENESIS OF HAPLOID PLANTS Observation after a few weeks: The cell culture has been contaminated as shown in the image section. Question: Please give the source(s) of contamination in this experiment and the way(s) to prevent it.arrow_forward
- Three haploid fungal mutants that require compound W for growth were isolated. Each mutant contains a recessive allele in a single gene. Three compounds (A, B and C) in the biosynthetic pathway to W are known, but their order in the pathway is unknown. Each compound is tested for its ability to support the growth of each of the three mutants. Phenotypes of all of the three mutants are shown in the following table (“+" indicates growth, "-" indicates no growth). A C W Mutant 1 Mutant 2 Mutant 3 What would be the phenotype of a haploid mutant that contains both mutant alleles in mutant 2 and 3? Phenotype refers to growth or absence of growth on compounds A, B, C and WN. O Like mutant 1 O Like mutant 2 Like mutant 3 O Like wild typearrow_forwardThe genetic data below is the DNA sequence of part of a theoretical fungal genome. a.) Which strand of DNA shown is the template strand? b.) What is the sequence of the mRNA produced from this gene? Label the 5’ and 3’ ends c.) What is the sequence of the peptide produced from the mRNA in (b)?arrow_forwardResearchers systematically replaced 414 essential genes in yeast with similar genes from humans. Almost half of these transplants (47%) were successful: cells with the humanized gene were able to function and grow. What does this observation tell us about differences between yeast and humans? How might this information be used?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Mechanisms of Genetic Change or Evolution; Author: Scientist Cindy;https://www.youtube.com/watch?v=5FE8WvGzS4Q;License: Standard Youtube License