🅰️Dominantone copy shows the trait (e.g. Huntington’s disease)

🅱️Recessiveneeds two copies (e.g. cystic fibrosis); carriers can hide it

🧬Sex-linkedgene on the X chromosome (colour blindness, hemophilia)

🌺Incomplete dominancea blend: red × white snapdragons → pink

🩸Codominanceboth show: AB blood type

🎚️Polygenicmany genes: height, skin colour