Domanda del libro di testo
Two pea plants heterozygous for the characters of pod color and pod shape are crossed. Draw a Punnett square to determine the phenotypic ratios of the offspring.
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Ch. 14 - Mendel and the Gene Idea
Urry12th EditionCampbell BiologyISBN: 9785794169850
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TOC.tableOfContents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle11
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance6
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology7
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth8
- Ch. 26 - Phylogeny and the Tree of Life8
- Ch. 27 - Bacteria and Archaea6
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants6
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development10
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition11
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System5
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction9
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology9
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Capitolo 14, Problema 2
A man with type A blood marries a woman with type B blood. Their child has type O blood. What are the genotypes of these three individuals? What genotypes, and in what frequencies, would you expect in future offspring from this marriage?
Guida verificata passo dopo passo1
Step 1: Identify the blood types and their corresponding genotypes. Type A blood can be AA or AO, type B blood can be BB or BO, and type O blood is always OO.
Step 2: Determine the parents' genotypes based on the child's blood type. Since the child has type O blood (OO), each parent must have contributed an O allele. Therefore, the man's genotype must be AO and the woman's genotype must be BO.
Step 3: Use a Punnett square to predict the genotypes of future offspring. The Punnett square for this cross would look like this:
| | A | O |
|---|---|---|
| B | AB | BO |
| O | AO | OO |
Step 4: Determine the frequencies of the genotypes. According to the Punnett square, there is a 25% chance for each genotype (AB, BO, AO, OO) in future offspring.
Step 5: Translate the genotypes into blood types. The possible blood types for future offspring are A (AO), B (BO), AB (AB), and O (OO), each with a 25% chance.
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Blood Type Genetics
Blood types are determined by the ABO gene, which has three alleles: A, B, and O. A and B are co-dominant, meaning that if both are present, both traits are expressed, while O is recessive. Therefore, individuals with type A blood can have genotypes AA or AO, and those with type B can have BB or BO. Type O blood results from the genotype OO.
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Blood Sugar Homeostasis
Punnett Square
A Punnett square is a tool used in genetics to predict the genotypes of offspring from parental genotypes. By arranging the alleles of each parent along the axes of a grid, one can visualize the possible combinations of alleles in the offspring. This method helps in determining the probabilities of each genotype occurring in future generations.
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01:37Punnett Squares
Mendelian Inheritance
Mendelian inheritance refers to the patterns of inheritance first described by Gregor Mendel, which include the principles of segregation and independent assortment. These principles explain how alleles segregate during gamete formation and how traits are inherited independently of one another. Understanding these principles is crucial for predicting the genetic outcomes of offspring in a given cross.
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02:27Polygenic Inheritance
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A man has six fingers on each hand and six toes on each foot. His wife and their daughter have the normal number of digits. Remember that extra digits is a dominant trait. What fraction of this couple's children would be expected to have extra digits?
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Flower position, stem length, and seed shape are three characters that Mendel studied. Each is controlled by an independently assorting gene and has dominant and recessive expression as indicated in Table 14.1.
If a plant that is heterozygous for all three characters is allowed to self-fertilize, what proportion of the offspring would you expect to be each of the following? (Note: Use the rules of probability instead of a huge Punnett square.)
a. Homozygous for the three dominant traits
b. Homozygous for the three recessive traits
c. Heterozygous for all three characters
d. Homozygous for axial and tall, heterozygous for seed shape
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Domanda del libro di testo
A pea plant heterozygous for inflated pods (Ii) is crossed with a plant homozygous for constricted pods (ii). Draw a Punnett square for this cross to predict genotypic and phenotypic ratios. Assume that pollen comes from the ii plant.
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