I believe the answer is gene splicing
Answer:During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it. During uncoating, replication, and assembly, the viral DNA or RNA incorporates itself into the host cell's genetic material and induces it to replicate the viral genome.
Explanation:
They cool too quickly to form crystal.
All cells in the body have the same DNA and the same genes. In organs & tissues the expression changes.