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)
4. Genetic Mapping and Linkage
Trihybrid Cross
4. Genetic Mapping and Linkage
Trihybrid Cross: Study with Video Lessons, Practice Problems & Examples
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8PRACTICE PROBLEM
After crossing organisms with AABBCC and aabbcc genotypes, we obtain offspring from F1 progeny that are heterozygous for all traits (AaBbCc). We then cross the F1 trihybrid with another organism that is homozygous recessive for the three traits and obtain offspring that have the following genotypes (shorthand):
ABC: 420
abc: 389
AbC: 93
aBc: 82
ABc: 62
abC: 68
aBC:12
Abc: 7
Which of the following shorthand genotypes are considered double crossovers?
After crossing organisms with AABBCC and aabbcc genotypes, we obtain offspring from F1 progeny that are heterozygous for all traits (AaBbCc). We then cross the F1 trihybrid with another organism that is homozygous recessive for the three traits and obtain offspring that have the following genotypes (shorthand):
ABC: 420
abc: 389
AbC: 93
aBc: 82
ABc: 62
abC: 68
aBC:12
Abc: 7
Which of the following shorthand genotypes are considered double crossovers?