Nature & Environment
Evolutionary tree of mammals
...table shows the DNA sequences from part of the casein gene of selected mammals. This is a short 50 base sequence taken from a much longer sequence of DNA. The bases are A (adenine), C (cytosine), G (guanine) and T (thymine). To compare two of these sequences, print out the sequences in colour, and cut them into strips. Lie them next to each other to compare them. Note to...