Doctor insights on:
Is Color Blindness Caused By Recessive Or Dominant Gene
Red-green color blindness is caused by an x-linked recessive gene. In a family, the mother is a carrier of this gene while the father does not have the gene. What are the possible effects on their children?
odds:: Half of the daughters will be carriers and half of the sons will be color blind. ...Read more
From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more
Why am i color blind? What is the cause of color blindness? No one in my family has the gene that causes color blindness.
Blame your Mom: If you have red-green color deficiency, then you carry a defective x-chromosome which you got from your mom (i assume you are a male). Your mom was a carrier so she was color normal and you had a 50% chance of getting the abnormal x from her. So in fact someone in your family, mom, had the gene. ...Read more
No one in my family has the gene that causes color blindness and yet I have it. How is this possible?
The most common colorblindedness is an x-linked trait. That means it occurs almost exclusively in males and is passed to them from a defect x from their mothers. Your mother could have gotten this gene from her mother. In this case, there would be no relatives with it.
Ps. Ask your mother's father if he is color-blind. ...Read more
Why not: Color deficiency, usually in males, is because of a defect on the sex chromosome (the x) which is unchecked by the y (male) chromosome. If you have this, none of your children will be color deficient because your male children get a y from you and your deficient x goes to your daughter whose mother is undoubtedly color normal. Color deficiency is not a particularly big handicap anyway. ...Read more
1.What is color blindness change in protein?
2..What is the change in the DNA?
3.How does the change in DNA cause the change in the protein?
Central dogma bio: There are a myriad of color blindness types that have identified genetic causes. Hence, answering these questions would be speculation at best. If you want to understand the general paradigm of translation, suggest this: http://www.csun.edu/~cmalone/pdf360/Ch14-1gen%20code.pdf ...Read more
The same: Genes are the elements of the chromosomes and so a disorder of a gene will be carried on a chromosome (usually the x for most color blindness). It is like saying is an apartment the same as an apartment building. ...Read more
Ask your dad: Most people with color-blindedness function completely normally with regard to visual activiies. They just have some difficulty telling some colors apart. For example, greens and browns tend to look the same to them. ...Read more
What are you asking?: Can you clarify? Genetic testing for DNA isn't subject to much in the way of outside influences. Genetic work on colorblindness is available but we're not sure what to do with the data. The former is life-and-death. The latter is perhaps a target for gene therapy that will give fullcolor vision to those who haven't enjoyed it. ...Read more
I have to do a genetic disorder report for class and was debating between color blindness and hemophilia. What are your opinions?
Both interesting: These are both fascinating diseases and the subject of much inquiry. Look on wikipedia and you will find much to talk about. The issues are quite different but the underpinning for each is genetic. The hemophilia has had impacts on history such as the family of queen victoria. Color deficiency has caused some famous accidents. Have fun. ...Read more
No: This is definitely not recommended. It is uncomfortable and most would not due it. It sometimes is done for religious purposes and by people under "the influence". The eyes focuses the sunlight and damages a portion of the retina where it is focused in a non-specific way so all receptors are damaged and color blindness does not result, just a loss of a portion of the visual field. ...Read more
Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?
An Autosomal: Recessive disorder: Both parents are unaffected carriers of a mutant gene. Each of their children has a 25% chance of inheriting the mutant gene from both & having the disorder. X-linked recessive: Mom carries a defective gene on one of her X chromosomes. Each son has a 50% chance of inheriting the X chromosome with the mutant gene & having the disorder; each daughter, 50% of being a carrier. ...Read more
Several: Color deficiency can occur with advanced diseases of the retina such as diabetes retinopathy and retinitis pigmentosa. Color vision changes can occur because of changes in the lens which alter color sensitivity. A few rare strokes in the brain can wipe out the color sensitivity. Most color deficiency is due to genetic changes in the chromosomes and is inherited. ...Read more
None: Colorblindedness is inherited. It cannot be caused by an accident. ...Read more
There is none: You can have colour blindness when you see red as black, but not black as red. ...Read more
Too much sun?: The eyes have visual pigment that responds to color. Some are born with defective pigment and can not detect red or green. More common the pigment is bleached out due to too much exposure to light - especially sunlight. If you have been exercising too much in the bright sun you may become dehydrated and also find it difficult to see colors. Cooling off, liquids, rest, and dim light are needed. ...Read more
I took ishihara plate test on internet and it shows that I have red color blind (protanopia). What can cause it, and what can be done about it?
Color vision is controlled by a gene on the x-chromosome. Females xx and males xy, making males more likely to be color blind.
Of the different types, red/green is the most common, with red being a sub-type of this.
You should see an ophthalmologist for an evaluation. If you are just now discovering this, it seems like you are pretty well adapted to your situation. ...Read more
Mostly genertic: In inherited color deficiency, a visual pigment has its spectrum of color reception altered to a small degree and to a large degree in those with high degree of this disorder. The photoreceptor count is the same, so the acuity is not lost - just the color recognition. There are a few less common color vision losses due to advanced retinal, optic nerve and CNS diseases. ...Read more
Color plates: Standardized testing of color vision can be performed by your eye doctor using specific color plates. Blue-green blindness is very common and usually easy to over come. Many people lead normal lives and never realize that they are color blind. Specific forms may cause more problems. A thorough evaluation by your eye doctor can determine the specific type and offer suggestions about management. ...Read more
Nothing: People who are colorblind often are not aware of the situation. They usually function well except in the fashion industry. ...Read more
Ophthalmologist prefer to use the term color deficit as blindness conveys other meanings. Lowered color perception can be inherited (many forms), can result from advanced loss of retinal cells, inherited retinal disease, and some forms occur due to CNS injury. There are excellent tests for the various types and they can be functionally ...Read more
Vision impairment and blindness are conditions in which a person cannot see well or see at all, even with glasses or contact lenses. If a person's best vision (with correction) out of either eye is only 20/70 - 20/200, he is impaired. If he can see no better than 20/200 or his visual field is no more than 20 degrees (severe "tunnel" vision), ...Read more
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