Topic: Chromosome theory, linkage and crossing over· Genetics and Evolution
What map unit (Centimorgan) is adopted in the construction of genetic maps ?
1. A unit of distance between two expressed genes, representing 10% cross over.
2. A unit of distance between two expressed genes, representing 100% cross over.
3. A unit of distance between genes on chromosomes, representing 1% cross over.
4. A unit of distance between genes on chromosomes, representing 50% cross over.