2007-01-28 13:23:43 · 4 answers · asked by miamiheat8372 1 in Science & Mathematics ➔ Biology
There are many different genetic defects which can cause color blindness.
The most common type of color blindness is red-green color blindness. This is caused by a defect on the sex chromosomes (X). Because of this 'defect' either the red (or green) sensitiveness is moved towards the green (or the red), which which results in a less good color vision. Or one of the cone types is missing at all, which is also called dichromacy.
Blue-yellow color blindness is caused by a defect on chromosome 7. And rod monochromacy, which reduced vision to lightness, can be caused by a variety of defects.
2007-01-30 07:01:55 · answer #1 · answered by Colblindor 2 · 0⤊ 0⤋
The most common form of hereditary color blindness affects the photoreceptors (cones) of the eye. The human eye has three types of cones according to the wavelengths (colors) they can absorb: red, green, and yellow. Usually in this form the middle wavelength (red/green) is compromised, and the rarest form, monochromacy (complete color blindness) leaves its victims only able to see in black and white, with shades of grey.
Depending on the type of color blindness, the defect varies (the gene responsible is on the X, or sex linked chromosome).
2007-01-28 13:41:13 · answer #2 · answered by swilliamrex 3 · 0⤊ 0⤋
Meiosis is whilst the cells cut as much as sort gametes. Then occurs fertilization the transforming into a member of of the two gametes. There could be a super form of diverse solutions on your query, it would help in case you have been slightly extra particular.
2016-12-17 04:44:59 · answer #3 · answered by apollon 3 · 0⤊ 0⤋
It's a recessive gene on the X-chromosome .... a recessive X-linked (or sex-linked) trait.
2007-01-28 13:26:17 · answer #4 · answered by ecolink 7 · 1⤊ 0⤋