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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
Klug10th EditionEssentials of GeneticsISBN: 9780135588789
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TOC.tableOfContents
- Ch. 1 - Introduction to Genetics16
- Ch. 2 - Mitosis and Meiosis28
- Ch. 3 - Mendelian Genetics37
- Ch. 4 - Modification of Mendelian Ratios53
- Ch. 5 - Sex Determination and Sex Chromosomes32
- Ch. 6 - Chromosome Mutations: Variation in Number and Arrangement37
- Ch. 7 - Linkage and Chromosome Mapping in Eukaryotes36
- Ch. 8 - Genetic Analysis and Mapping in Bacteria and Bacteriophages24
- Ch. 9 - DNA Structure and Analysis38
- Ch. 10 - DNA Replication29
- Ch. 11 - Chromosome Structure and DNA Sequence Organization22
- Ch. 12 - The Genetic Code and Transcription36
- Ch. 13 - Translation and Proteins27
- Ch. 14 - Gene Mutation, DNA Repair, and Transposition34
- Ch. 15 - Regulation of Gene Expression in Bacteria22
- Ch. 16 - Regulation of Gene Expression in Eukaryotes37
- Ch. 17 - Recombinant DNA Technology27
- Ch. 18 - Genomics, Bioinformatics, and Proteomics30
- Ch. 19 - The Genetics of Cancer21
- Ch. 20 - Quantitative Genetics and Multifactorial Traits37
- Ch. 21 - Population and Evolutionary Genetics45
Klug10th EditionEssentials of GeneticsISBN: 9780135588789Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 22c
Draw all possible conclusions concerning the mode of inheritance of the trait portrayed in the following limited pedigree.
Guida verificata passo dopo passo1
Step 1: Identify the affected individuals and their sex in the pedigree. Here, only one female (represented by a filled circle) is affected, while all other individuals are unaffected.
Step 2: Consider the pattern of inheritance by analyzing the distribution of the trait across generations and between sexes. Since only one female is affected and no males are affected, this suggests the trait might not be Y-linked.
Step 3: Evaluate whether the trait could be autosomal dominant or recessive. If it were autosomal dominant, typically one affected parent would pass the trait to offspring, but here neither parent is affected, which argues against autosomal dominant inheritance.
Step 4: Consider X-linked inheritance. Since only a female is affected and no males, and the trait appears in only one generation, it could be consistent with X-linked recessive or dominant inheritance, but the absence of affected males makes X-linked recessive less likely.
Step 5: Summarize conclusions: The trait is likely inherited in an autosomal recessive or possibly X-linked dominant manner, but more data would be needed to confirm. The single affected female with unaffected parents suggests recessive inheritance.
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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 whether a trait is dominant, recessive, autosomal, or sex-linked. Understanding how to interpret these symbols and relationships is essential for drawing conclusions about inheritance.
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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. Each mode has characteristic patterns in pedigrees, such as affected individuals in every generation for dominant traits or skipping generations for recessive traits.
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Percorso guidato
05:13Organelle Inheritance
Sex-Linked vs. Autosomal Traits
Sex-linked traits are associated with genes located on sex chromosomes, often showing different patterns in males and females, while autosomal traits are linked to non-sex chromosomes and typically affect both sexes equally. Recognizing whether a trait affects males and females differently or equally helps determine if the trait is sex-linked or autosomal.
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Percorso guidato
07:56Sex-Linked Genes
Pratica correlata
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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Domanda del libro di testo
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.
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