16Q Suppose a gene arrangement on a normal chromosome is: ABCDEFGIJKL. Suppose on an altered chromosome it is: ABIHGFEKJCDL. Explain.
1. Crossing over has occurred
2. An inversion between BC & IJ
3. An inversion between BC & IJ followed by one between DE & KL
4. An inversion between BC & KL then one between DE and IJ
5. None of the above.
CORRECT! Diagram the normal chromosome on paper and then produce two sequenced inversions between the genes designated in answer #3. It produces the arrangement in the problem.