Modes of Selection: Compare Patterns and Mate Choice
Measure beak depth in a finch population and plot the values. Most birds may cluster near the middle, with a few at either extreme. Now consider a drought that leaves mainly large, hard seeds for two years. If birds with deeper beaks leave more offspring and the trait is heritable, the distribution
Transcription and RNA Processing: Steps and Worked Examples
A eukaryotic cell can use a gene without moving its nuclear DNA to a ribosome. It transcribes the gene into RNA, processes the transcript when needed, and exports the message for translation. Following those steps helps you locate an experimental defect: failure to make RNA, incorrect splicing, and
