Domanda del libro di testo
Draw all possible conclusions concerning the mode of inheritance of the trait portrayed in the following limited pedigree.
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Ch. 3 - Mendelian Genetics
Klug12th EditionConcepts of GeneticsISBN: 9780135564776
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TOC.tableOfContents
- Ch. 1 - Introduction to Genetics17
- Ch. 2 - Mitosis and Meiosis36
- Ch. 3 - Mendelian Genetics51
- Ch. 4 - Extensions of Mendelian Genetics74
- Ch. 5 - Chromosome Mapping in Eukaryotes51
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages46
- Ch. 7 - Sex Determination and Sex Chromosomes33
- Ch. 8 - Chromosome Mutations: Variation in Number and Arrangement40
- Ch. 9 - Extranuclear Inheritance31
- Ch. 10 - DNA Structure and Analysis43
- Ch. 11 - DNA Replication and Recombination44
- Ch. 12 - DNA Organization in Chromosomes30
- Ch. 13 - The Genetic Code and Transcription54
- Ch. 14 - Translation and Proteins47
- Ch. 15 - Gene Mutation, DNA Repair, and Transposition41
- Ch. 16 - Regulation of Gene Expression in Bacteria29
- Ch. 17 - Transcriptional Regulation in Eukaryotes41
- Ch. 18 - Post-transcriptional Regulation in Eukaryotes33
- Ch. 19 - Epigenetics33
- Ch. 20 - Recombinant DNA Technology44
- Ch. 21 - Genomic Analysis36
- Ch. 22 - Applications of Genetic Engineering and Biotechnology36
- Ch. 23 - Developmental Genetics37
- Ch. 24 - Cancer Genetics34
- Ch. 25 - Quantitative Genetics and Multifactorial Traits54
- Ch. 26 - Population and Evolutionary Genetics45
Klug12th EditionConcepts of GeneticsISBN: 9780135564776Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 21
Consider the following pedigree.
Predict the mode of inheritance of the trait of interest and the most probable genotype of each individual. Assume that the alleles A and a control the expression.
Guida verificata passo dopo passo1
Step 1: Analyze the pattern of affected individuals across generations. Notice that both males and females are affected, and the trait appears in every generation, suggesting it is likely a dominant trait.
Step 2: Check if the trait skips generations. Since affected individuals are present in each generation, this supports the idea of a dominant mode of inheritance rather than recessive.
Step 3: Consider the genotypes of the parents in generation I. Since individual I-2 is affected and I-1 is unaffected, and they have both affected and unaffected children, I-2 is likely heterozygous (A/a) and I-1 is homozygous recessive (a/a).
Step 4: Assign genotypes to individuals in generation II based on their parents' genotypes and their affected status. For example, affected individuals are likely A/a, and unaffected individuals are a/a.
Step 5: Continue this logic for generations III and IV, using the inheritance pattern and the genotypes of parents to predict the most probable genotype of each individual, remembering that affected individuals must have at least one dominant allele (A).
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Pedigree Analysis
Pedigree analysis is a tool used to study the inheritance patterns of traits through generations in a family. It uses standardized symbols to represent individuals and their traits, helping to identify dominant, recessive, autosomal, or sex-linked inheritance. Understanding how traits appear and skip generations is key to predicting genotypes.
Video consigliato:
Percorso guidato
01:59
Pedigree Flowchart
Modes of Inheritance
Modes of inheritance describe how genetic traits are transmitted from parents to offspring. Common modes include autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. Recognizing patterns such as affected individuals in every generation or skipping generations helps determine the mode.
Video consigliato:
Percorso guidato
05:13Organelle Inheritance
Genotype Prediction Using Alleles
Genotype prediction involves determining the genetic makeup (e.g., AA, Aa, or aa) of individuals based on their phenotype and family history. Using dominant (A) and recessive (a) alleles, one can infer carriers and affected individuals by analyzing who expresses the trait and how it segregates in the pedigree.
Video consigliato:
Percorso guidato
03:03New Alleles and Migration
Pratica correlata
Domanda del libro di testo
In assessing data that fell into two phenotypic classes, a geneticist observed values of 250:150. She decided to perform a ² analysis by using the following two different null hypotheses:
(a) the data fit a 3:1 ratio, and
(b) the data fit a 1:1 ratio.
Calculate the ² values for each hypothesis. What can be concluded about each hypothesis?
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Domanda del libro di testo
The following are F₂ results of two of Mendel's monohybrid crosses.
For each cross, state a null hypothesis to be tested using x² analysis. Calculate the x² value and determine the p value for both. Interpret the p-values. Can the deviation in each case be attributed to chance or not? Which of the two crosses shows a greater amount of deviation?
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Domanda del libro di testo
Draw all possible conclusions concerning the mode of inheritance of the trait portrayed in the following limited pedigree.
1094
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Domanda del libro di testo
The basis for rejecting any null hypothesis is arbitrary. The researcher can set more or less stringent standards by deciding to raise or lower the p value used to reject or not reject the hypothesis. In the case of the chi-square analysis of genetic crosses, would the use of a standard of p = 0.10 be more or less stringent about not rejecting the null hypothesis? Explain.
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Domanda del libro di testo
Draw all possible conclusions concerning the mode of inheritance of the trait portrayed in the following limited pedigree.
1084
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