by going to McDonalds, looking at ronaldMcdonald
If a person with color blindness and dwarfism has a daughter, she would need to inherit the color blindness gene from her father and the dwarfism gene from her mother to be a color-blind dwarf. This would occur 25% of the time if the two conditions are caused by different genes and they independently assort.
X' = color blindnessX'X'-- X --X'Yis a cross that could lead to a color blind female as the mother is homozygous recessive and the father's X chromosome is the recessive color blind trait.
The probability of a child being color blind depends on the parents' genetic makeup. If the mother is a carrier of the color blindness gene located on the X chromosome and the father does not carry the gene, the chances are 0% for a daughter and 50% for a son to inherit color blindness. If the father is color blind and the mother is a carrier, the chances are 50% for a daughter and 50% for a son to inherit color blindness.
Color blindness is a recessive trait, meaning that an individual needs to inherit two copies of the gene for color blindness (one from each parent) in order to be color blind. If an individual inherits only one copy of the gene, they are considered a carrier and will not exhibit color blindness.
Helen Keller
Through the X chromosome, usually from a mother, (whom does not show any signs of colour blindness, yet she is a CARRIER of the X chromosome) passed down to son. Males usually get this because they only posses ONE X, in their XY life.
Males inherit the gene from their mothers.
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Although it is a disease it is not contagious. If you were in close contact with a person who had color blindness you would not catch the disease.
the first person that had color blindness was Mike Lion
Color blindness comes in varying degrees. With complete color blindness a person sees only black and white, no colors. There is also partial color blindness, which prevents a person from fully perceiving all colors, although there is some color perception. There are few practical consequences to a lack of color vision - it can be harder to tell when fruit is ripe. But then, you can still feel the fruit to see how hard it is.
Red/green color blindness may slightly increase an affected person's chances of contracting leprosy.