How to Solve Two-Traits Genetics Problems

Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair tasks such as selecting ripe fruit, choosing clothing, and reading traffic lights. Color blindness may make some academic activities more difficult. However, issues are generally minor, and the colorblind automatically develop adaptations and coping mechanisms. People with total color blindness (achromatopsia) may also be uncomfortable in bright environments and have decreased visual acuity. The most common cause of color blindness is an inherited problem or variation in the functionality of one or more of the three classes of cone cells in the retina, which mediate color vision. Males are more likely to be color blind than females, because the genes responsible for the most common forms of color blindness are on the X chromosome. Non-color-blind females can carry genes for color blindness and pass them on to their children. Color blindness can also result from physical or chemical damage to the eye, the optic nerve, or parts of the brain. Screening for color blindness is typically done with the Ishihara color test. There is no cure for color blindness. Diagnosis may allow an individual, or their parents/teachers to actively accommodate the condition. Special lenses such as EnChroma glasses or X-chrom contact lenses may help people with red–green color blindness at some color tasks, but they do not grant the wearer “normal color vision“. Mobile apps can help people identify colors. Red–green color blindness is the most common form, followed by blue–yellow color blindness and total color blindness. Red–green color blindness affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). The ability to see color also decreases in old age. In certain countries, color blindness may make people ineligible for certain jobs, such as those of aircraft pilots, train drivers, crane operators, and people in the armed forces. The effect of color blindness on artistic ability is controversial, but a number of famous artists are believed to have been color blind. Problem: The ABO blood type in humans is under the control of autosomal multiple alleles. Color blindness is a recessive x linked trait. A male with blood type A and normal vision marries a female with normal vision who also happened to have the blood type A. The couple’s first child is color blind with blood type O, what is the probability that their next female has normal vision and blood type O. #ColorBlindness #colorBlind #normalVision #deuteranopia #interestingFacts #factsAboutHumanBody #protanopia #tritanopia #eyesight #colorBlindPeopleSee #eyes #colorBlindGlasses #howBlindPeopleSee #howColorBlindPeopleSee #fatsAbourHumanEye #NikolaysGeneticsLessons #visionTest #Facts #humanInterest #science #visual #buzzfeedblue #ishiharaTest #BuzzFeedScience #BuzzFeedYouTube #perspective #optometry #redgreenColorblind #buzzfeed #AutosomalRecessive