Genetics and Epigenetics (Leaving Cert Biology): Flashcards

Study of heredity; traits passed from parents to offspring

How behavior/environment affects gene function without changing DNA sequence

Yes, reversible (unlike genetic changes)

Complete set of all genetic material in organism

Specific DNA section with instructions for a protein

$CH_3$ group attaches to DNA, prevents gene working

DNA wrapped tightly around histones, gene turned off

46 chromosomes

23 chromosomes

46 chromosomes (23 from each gamete)

Similar organisms that interbreed to produce fertile offspring

Epigenetic marker blocks pigment in warm areas

Epigenetic changes inherited across generations