DNA

Script: Ama-chromosomes angu 46 we-zygote's ajamele umphumela wokuthoma ohlukileko wokwakheka okupheleleko komuntu oyedwa. Ukuhleleka lokho kuhlala ngeencenyana ezincane ezihlangeneko zamamolekyula ezibizwa nge-DNA. Zinemilayezo yokukhula komzimba woke.

Amamolekyuli we-DNA afana Nesikhwelo esihlangeneko esibizwa nge-double helix. Amafindo wesikhwelo enziwe mamolekyuli amabili, noma ukwakheka okubizwa nge-guanine, cytosine, adenine, ne thymine.

I-Guanine ihlangana kwaphela ne-cytosine, begodu i-adenine yona ihlangane ne-thymine.