Suppose six populations of butterflies from six different geographic locations w

Question

Suppose six populations of butterflies from six different geographic locations were genetically analyzed. It was determined that each of the six populations had a different arrangement of chromosome 7. The banding pattern of the ancestral chromosome was numbered 98765432. In what order did the other five variants of chomosome 7 most likely arise? 4 Variant 1 Variant 2 Variant 3 Variant 4 98755432 9785543285549732853549732 53549732 53549732 85549732 853549732 97855432 98755432 9785543298755432 53549732 853549732 8554973297855432 98755432 Variant 5 85549732853549732 53549732

Explanation / Answer

The mutations in the variants can most logically be explained as cumulative mutations, as such:
Ancestral Gene: 98765432
Variant 1: 98755432
Variant 2: 97855432
Variant 3: 85549732
Variant 4: 853549732
Variant 5: 5359732
Any mutation being added on should be the least radical, i.e. should not be too different a change as compared to the previous sequence.
Hence Option 1 is the ANSWER

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