The first is that genetic characteristics, which are now called alleles, are discrete and have alternate forms (e.g., purple vs. white or tall vs. dwarf), each inherited from one of two parents.
Wa ezzaran amos as samalan win etari tawaɣrinen amarad s isim wan alles istaran tolas ilan dumu tan ( almital: tabangalt, tamallay meɣ tichijrit ,takkindimt)