Domanda del libro di testo
What type or types of inheritance are consistent with the following pedigree?
508
views
Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testo
Sanders 3rd EditionCh. 17 - Organelle Inheritance and the Evolution of Organelle GenomesProblema 13
Sanders 3rd EditionCh. 17 - Organelle Inheritance and the Evolution of Organelle GenomesProblema 13Capitolo 17, Problema 13
You have isolated (1) a streptomycin-resistant mutant (strᴿ) of Chlamydomonas that maps to the chloroplast genome and (2) a hygromycin-resistant mutant (hygᴿ) of Chlamydomonas that maps to the mitochondrial genome. What types of progeny do you expect from the following reciprocal crosses?
mt⁺ strᴿ hygˢ× mt⁻ strˢ hygᴿ
mt⁺ strˢ hygᴿ× mt⁻ strᴿ hygSˢ
Guida verificata passo dopo passo1
Understand the genetic basis of the problem: Streptomycin resistance (strᴿ) is encoded in the chloroplast genome, while hygromycin resistance (hygᴿ) is encoded in the mitochondrial genome. Chloroplast and mitochondrial genomes are inherited uniparentally in Chlamydomonas, with the chloroplast genome inherited from the mt⁺ parent and the mitochondrial genome inherited from the mt⁻ parent.
Analyze the first cross: mt⁺ strᴿ hygˢ × mt⁻ strˢ hygᴿ. Since the chloroplast genome is inherited from the mt⁺ parent, the progeny will inherit the strᴿ allele. The mitochondrial genome is inherited from the mt⁻ parent, so the progeny will inherit the hygᴿ allele.
Predict the progeny phenotype for the first cross: All progeny will be streptomycin-resistant (strᴿ) due to the chloroplast inheritance from the mt⁺ parent and hygromycin-resistant (hygᴿ) due to the mitochondrial inheritance from the mt⁻ parent.
Analyze the second cross: mt⁺ strˢ hygᴿ × mt⁻ strᴿ hygˢ. In this case, the chloroplast genome is inherited from the mt⁺ parent, so the progeny will inherit the strˢ allele. The mitochondrial genome is inherited from the mt⁻ parent, so the progeny will inherit the hygˢ allele.
Predict the progeny phenotype for the second cross: All progeny will be streptomycin-sensitive (strˢ) due to the chloroplast inheritance from the mt⁺ parent and hygromycin-sensitive (hygˢ) due to the mitochondrial inheritance from the mt⁻ parent.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
5mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Chloroplast and Mitochondrial Genetics
Chloroplasts and mitochondria are organelles with their own genomes, which are inherited maternally in many organisms. In Chlamydomonas, mutations in these genomes can lead to resistance to specific antibiotics, such as streptomycin and hygromycin. Understanding how these organelles contribute to inheritance patterns is crucial for predicting progeny outcomes in genetic crosses.
Video consigliato:
Percorso guidato
05:13
Organelle Inheritance
Reciprocal Crosses
Reciprocal crosses involve mating two different strains in both possible combinations to assess the inheritance of traits. This method helps determine whether traits are linked to specific parental genotypes and can reveal the effects of maternal versus paternal contributions to progeny. Analyzing the results of these crosses is essential for understanding the genetic basis of the observed traits.
Video consigliato:
Percorso guidato
26:08Trihybrid Cross
Antibiotic Resistance Mechanisms
Antibiotic resistance in organisms like Chlamydomonas can arise from mutations in specific genes within the chloroplast or mitochondrial genomes. These mutations can confer the ability to survive in the presence of antibiotics, which is a key factor in determining the phenotypes of progeny from genetic crosses. Recognizing how these resistance traits are inherited is vital for predicting the outcomes of the crosses described in the question.
Video consigliato:
Percorso guidato
02:19R Plasmid
Pratica correlata
Domanda del libro di testo
A 50-year-old man has been diagnosed with MELAS syndrome. His wife is phenotypically normal, and there is no history of MELAS syndrome in either of their families. The couple is concerned about whether their children will develop the disease. As a genetic counselor, what will you tell them? Would your answer change if it were the mother who exhibited disease symptoms rather than the father?
414
views
Domanda del libro di testo
You are a genetic counselor, and several members of the family whose pedigree for an inherited disorder is depicted in Genetic Analysis 17.2 consult with you about the probability that their progeny may be afflicted. What advice would you give individuals III-1, III-2, III-4, III-6, III-8, and III-9?
836
views
Domanda del libro di testo
You have isolated two petite mutants, pet1 and pet2, in Saccharomyces cerevisiae. When pet1 is mated with wild-type yeast, the haploid products following meiosis segregate 2:2 (wild type : petite). In contrast, when pet2 is mated with wild type, all haploid products following meiosis are wild type. To what class of petite mutations does each of these petite mutants belong? What types of progeny do you expect from a pet1 × pet2 mating?
374
views
Domanda del libro di testo
Consider this human pedigree for a vision defect.
What is the most probable mode of inheritance of the disease? Identify any discrepancies between the pedigree and your proposed mode of transmission, and provide possible explanations for these exceptions.
512
views
Domanda del libro di testo
A mutation in Arabidopsis immutans results in the necrosis (death) of tissues in a mosaic configuration. Examination of the mitochondrial DNA detects deletions of various regions of the mitochondrial genome in the tissues that are necrotic. When immutans plants are crossed with wild-type plants, the are wild type, and the are wild type and immutans in a 3:1 ratio. Explain the inheritance of the immutans mutation and a possible origin of the mitochondrial DNA deletions.
462
views