Ese kuba nyamweru biterwa n'iki? Shira amatsiko.
Nyamweru mu bihugu bimwe usanga aba bantu bagirirwa nabi, ahandi ugasanga barabanena nyamara ari ubumuga buvukanwa umuntu atihamagarira.
Ese kuba nyamweru biterwa n'iki?
Ubusanzwe mu mivukire yacu, habaho ibice bibiri mu turemangingo (genes). Habamo utwigaragaza (dominant), n'ututigaragaza (recessif).
Iyo rero mu guhura kw'intangangabo n'intangangore habaye ikibazo mu kwivanga kwa twa turemangingo tugena ibara ry'uruhu (melanin), icyo gihe umwana avuka ntatwo afite, nuko ibara rye rikabura gutyo
Kuba nyamweru ni ukutagira melanin, umusemburo utanga ibara ry'uruhu. Ibi umwana abikomora ku babyeyi be.
Source : https://yegob.rw/ese-kuba-nyamweru-biterwa-niki-shira-amatsiko/
