The diagram below represents chromosomes arrangement in somatic cells of a female suffering from a certain genetic disorder. a) i. Name the disorder ii. Name the type of chromosomal mutation that causes the above disorder. iii. State two symptoms of a female with above disorder

Haya, hapa kuna majibu kwa swali la 4:

a)

i) Ugonjwa huo unaitwa Down syndrome.

ii) Aina ya mabadiliko ya kromosomu yanayosababisha ugonjwa huu ni trisomy (kromosomu tatu badala ya mbili kwenye jozi ya 21), ambayo hutokana na non-disjunction wakati wa meiosis.

iii) Dalili mbili za mwanamke mwenye ugonjwa huu ni:

• Ulemavu wa akili (kiwango cha wastani hadi kidogo)
• Sura ya uso yenye sifa maalum (kama vile uso bapa, macho yaliyoelekezwa juu, na masikio madogo)