4. Genetic Mapping and Linkage
Crossing Over and Recombinants
4. Genetic Mapping and Linkage
Crossing Over and Recombinants
07:52
Practice this topic
- Multiple Choice
Which of the following gametes can be formed from the genotype AaBb if AB and ab are linked?
- Multiple Choice
An experiment that was performed found the recombination frequency between two genes was 12.5%. What is the distance (in mapping units) between two genes?
- Multiple Choice
Which of the following terms describes two copies of the same chromosome?
- Open Question
Genes E and H are syntenic in an experimental organism with the genotype EH/eh. Assume that during each meiosis, one crossover occurs between these genes. No homologous chromosomes escape crossover, and none undergo double crossover. Are genes E and H genetically linked? Why or why not? What is the proportion of parental gametes produced by meiosis?
- Open QuestionWhy does more crossing over occur between two distantly linked genes than between two genes that are very close together on the same chromosome?
- Open QuestionExplain why a 50 percent recovery of single-crossover products is the upper limit, even when crossing over always occurs between two linked genes?
- Open QuestionWhy are double-crossover events expected less frequently than single-crossover events?