<Ul> <Li> Deuteranomaly (most common--6% of males, 0.4% of females): These individuals have a mutated form of the medium - wavelength (green) pigment . The medium - wavelength pigment is shifted towards the red end of the spectrum resulting in a reduction in sensitivity to the green area of the spectrum . Unlike protanomaly the intensity of colors is unchanged . The deuteranomalous person is considered "green weak". For example, in the evening, dark green cars appear to be black to Deuteranomalous people . Similar to the protanomates, deuteranomates are poor at discriminating small differences in hues in the red, orange, yellow, green region of the spectrum . They make errors in the naming of hues in this region because the hues appear somewhat shifted towards green . One very important difference between deuteranomalous individuals and protanomalous individuals is deuteranomalous individuals do not have the loss of "brightness" problem . </Li> </Ul> <Li> Deuteranomaly (most common--6% of males, 0.4% of females): These individuals have a mutated form of the medium - wavelength (green) pigment . The medium - wavelength pigment is shifted towards the red end of the spectrum resulting in a reduction in sensitivity to the green area of the spectrum . Unlike protanomaly the intensity of colors is unchanged . The deuteranomalous person is considered "green weak". For example, in the evening, dark green cars appear to be black to Deuteranomalous people . Similar to the protanomates, deuteranomates are poor at discriminating small differences in hues in the red, orange, yellow, green region of the spectrum . They make errors in the naming of hues in this region because the hues appear somewhat shifted towards green . One very important difference between deuteranomalous individuals and protanomalous individuals is deuteranomalous individuals do not have the loss of "brightness" problem . </Li> <P> Those with tritanopia and tritanomaly have difficulty discriminating between bluish and greenish hues, as well as yellowish and reddish hues . </P> <P> Color blindness involving the inactivation of the short - wavelength sensitive cone system (whose absorption spectrum peaks in the bluish - violet) is called tritanopia or, loosely, blue--yellow color blindness . The tritanope's neutral point occurs near a yellowish 570 nm; green is perceived at shorter wavelengths and red at longer wavelengths . Mutation of the short - wavelength sensitive cones is called tritanomaly . Tritanopia is equally distributed among males and females . Jeremy H. Nathans (with the Howard Hughes Medical Institute) demonstrated that the gene coding for the blue receptor lies on chromosome 7, which is shared equally by males and females . Therefore, it is not sex - linked . This gene does not have any neighbor whose DNA sequence is similar . Blue color blindness is caused by a simple mutation in this gene . </P>

What are the specific symptoms of color blindness