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.
Red-green color blindness is a sex-linked trait. The receptors of red and green color are found on the X chromosome; therefore, men are more likely to be red-green color blind â¦ since they only have one.   Blue-yellow color blindness is found on chromosome 7, and is equally distributed between men and women.2 people found this useful.ost color blindness is caused by an inherited genetic defect where the functioning of the color receptive cones in the retina is deficient-or where the cones are absent alt â¦ ogether. It is most commonly inherited from mutations on the X chromosome.