Table of contents
- 1. Introduction to Genetics(0)
- 2. Mendel's Laws of Inheritance(0)
- 3. Extensions to Mendelian Inheritance(0)
- 4. Genetic Mapping and Linkage(0)
- 5. Genetics of Bacteria and Viruses(0)
- 6. Chromosomal Variation(0)
- 7. DNA and Chromosome Structure(0)
- 8. DNA Replication(0)
- 9. Mitosis and Meiosis(0)
- 10. Transcription(0)
- 11. Translation(0)
- 12. Gene Regulation in Prokaryotes(0)
- 13. Gene Regulation in Eukaryotes(0)
- 14. Genetic Control of Development(0)
- 15. Genomes and Genomics(0)
- 16. Transposable Elements(0)
- 17. Mutation, Repair, and Recombination(0)
- 18. Molecular Genetic Tools(0)
- 19. Cancer Genetics(0)
- 20. Quantitative Genetics(0)
- 21. Population Genetics(0)
- 22. Evolutionary Genetics(0)
3. Extensions to Mendelian Inheritance
Penetrance and Expressivity
3. Extensions to Mendelian Inheritance
Penetrance and Expressivity: Study with Video Lessons, Practice Problems & Examples
Back to all problems
2PRACTICE PROBLEM
Familial polydactyly is an autosomal dominant trait that is characterized by extra fingers or toes. One of the types of polydactyly is postaxial polydactyly type B, which has a penetrance of approximately 40%. What is the probability of a child being born with polydactyly to parents who are carriers for the trait?
Familial polydactyly is an autosomal dominant trait that is characterized by extra fingers or toes. One of the types of polydactyly is postaxial polydactyly type B, which has a penetrance of approximately 40%. What is the probability of a child being born with polydactyly to parents who are carriers for the trait?