Story related and cannot be missed. Just simply play the game.
There are 9 memories in DNA Sequence 7.
Memory 1 - Benvenuto
Memory 2 - That's Gonna Leave a Mark
Memory 3 - Building Blocks
Memory 4 - Breakout
Memory 5 - Clothes Make the Man
Memory 6 - Cleaning House
Memory 7 - Monkey See, Monkey Do
Memory 8 - By Leaps and Bounds
Memory 9 - Everything Must Go
When you complete Memory 9, the achievement will unlock.