The preliminaries to Portugalâs formal colonial rule in Africa are extensively explored here (in a work first published in 1969) by the writer generally considered to be the doyen of foreign scholars of Portuguese expansion. Castelo, ClÃ¡udia.
Description: The two genes that produce red and green light-sensitive proteins are located on the X chromosome. Mutations in these genes can cause color blindness. Color blindness is a common inherited sex-linked disorder that affects a person's ability to see or recognize certain colors.Eight to ten percent of all males and one half of a percent of all females are color-blind.Keywords: sensitive proteins,chromosome mutations,color blindness,chromosome x,x chromosome,sex linked disorder,genes,females,colors.utations in these genes can cause color blindness. Color blindness is a common inherited sex-linked disorder that affects a person's ability to see or recognize certain colors.
Genetic basis of Color Blindness. Color vision deficiency or color blindness is caused when the cone cells are unable to distinguish among the different light wavelengths and therefore misfire, causing the brain to misinterpret certain colors.ny mutations that affect the above genes causes the color vision deficiency. For example, a mutation affecting the first two genes would cause a defect in detecting the green and red color of the light spectrum.