Textbook Question
If the haploid number for a plant species is 4, how many chromosomes are found in a member of the species that has one of the following characteristics? Explain your reasoning in each case.
Triploidy
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Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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Table of contents
- 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: 9780135564172Not the one you use?Change textbook
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Sanders 3rd EditionCh. 10 - Eukaryotic Chromosome Abnormalities and Molecular OrganizationProblem 8h
Sanders 3rd EditionCh. 10 - Eukaryotic Chromosome Abnormalities and Molecular OrganizationProblem 8hChapter 10, Problem 8h
If the haploid number for a plant species is 4, how many chromosomes are found in a member of the species that has one of the following characteristics? Explain your reasoning in each case.
Hexaploidy
Verified step by step guidance1
Understand the concept of haploid number: The haploid number (n) represents the number of chromosomes in a single set of the genome. For this plant species, the haploid number is given as 4 (n = 4).
Define hexaploidy: Hexaploidy refers to an organism having six sets of chromosomes. This means the total number of chromosomes in a hexaploid organism is calculated as 6 times the haploid number.
Set up the formula for calculating the total number of chromosomes: The total number of chromosomes in a hexaploid organism can be expressed as: , where n is the haploid number.
Substitute the haploid number into the formula: Replace n with 4 in the formula to determine the total number of chromosomes in a hexaploid organism.
Explain the reasoning: Since hexaploidy involves six sets of chromosomes, multiplying the haploid number (4) by 6 gives the total number of chromosomes. This calculation reflects the genetic makeup of the organism.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Haploid and Diploid Numbers
The haploid number (n) refers to the number of chromosomes in a gamete, which is half the total number of chromosomes in a diploid organism. In this case, if the haploid number for the plant species is 4, the diploid number (2n) would be 8, representing the total chromosomes in somatic cells.
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Diploid Genetics
Polyploidy
Polyploidy is a condition in which an organism has more than two complete sets of chromosomes. Hexaploidy, specifically, means that the organism has six sets of chromosomes. This can occur through processes such as hybridization or errors in cell division, leading to increased genetic variation and potential advantages in certain environments.
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Calculating Chromosome Number in Polyploids
To determine the total number of chromosomes in a hexaploid organism, you multiply the haploid number by the number of chromosome sets. For a species with a haploid number of 4, a hexaploid would have 6 sets, resulting in a total of 4 x 6 = 24 chromosomes in each somatic cell.
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Related Practice
Textbook Question
If the haploid number for a plant species is 4, how many chromosomes are found in a member of the species that has one of the following characteristics? Explain your reasoning in each case.
Monosomy
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Textbook Question
If the haploid number for a plant species is 4, how many chromosomes are found in a member of the species that has one of the following characteristics? Explain your reasoning in each case.
Tetraploidy
417
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Textbook Question
Mating between a male donkey (2n = 62) and a female horse (2n = 64) produces sterile mules. Recently, however, a very rare event occurred—a female mule gave birth to an offspring by mating with a horse.
Determine how many chromosomes are in the mule karyotype, and explain why mules are generally sterile.
703
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Textbook Question
Mating between a male donkey (2n = 62) and a female horse (2n = 64) produces sterile mules. Recently, however, a very rare event occurred—a female mule gave birth to an offspring by mating with a horse.
How many chromosomes does the mule–horse offspring carry?
5247
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Textbook Question
Mating between a male donkey (2n = 62) and a female horse (2n = 64) produces sterile mules. Recently, however, a very rare event occurred—a female mule gave birth to an offspring by mating with a horse.
Why is it very unlikely that the offspring will have fully horse-like genetic characteristics?
793
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