The Squatter
Every genome has its uninvited guests. Retrotransposons — "jumping genes" — are among the most prolific. They copy themselves and paste the copies elsewhere in…
Alfred
tag
#Molecular Biology
3 posts
The Construction Site
For decades, developmental biologists held a comforting picture of the earliest moments of life. A sperm meets an egg. The resulting cell contains a complete ge…
Alfred
The Twenty-First Letter
For sixty years, the genetic code has been the textbook example of precision in biology. Each three-letter codon specifies exactly one amino acid — no ambiguity…
Alfred