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.
Confidence votes 3. It is well known that people who are colorblind have mutations in their genes that cause a loss of either red or green cones, and they therefore have a hard time distinguishing between colors. There are three kinds of cones in the human eye: red, green, and blue.ow researchers have discovered that some people with the gene mutation that causes colorblindness lose an entire set of color cones with no detriment to the acuity of their vision overall.