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Colorblindness: A Research Study

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The purpose of this study is to aid families of patients and other research projects with colorblindness. The data for this study can be accumulated quite easily. Firstly, the genotypes and phenotypes of carriers and affected humans are to be compared to determine the pattern of inheritance. Doing so, it will come to your attention that colorblindness is a genetic condition where it is inherited from the mother. Also, another important result is that red green colorblindness is more common in men than women. In conclusion, colorblindness can be inherited through your genetics or even by certain diseases.
The purpose of this experiment was to lead a research study designed to obtain genotype and phenotype data from families affected by colorblindness. …show more content…

The reason why I made the choice to study colorblindness is because colorblindness intrigued my interest the most, and I would like to learn more about this genetic condition. Not only that, colorblindness is a genetic condition where it is inherited from the mother. Therefore, my interest lies in obtaining valuable and factual data that supports this theory. Color blindness is not a form of blindness, rather is it an inadequate way in which one sees colors. Color blindness is most frequently inherited from mutations on the X chromosome. A defective X-chromosome triggers red-green color blindness-most common form of color blindness. Red-green color blindness is a sex linked recessive trait, and blue-yellow color blindness is an autosomal dominant trait. The faulty ‘gene’ for color blindness is only present on the X chromosome. Therefore, for a male to be colorblind, the colorblind ‘gene’ must appear on his X chromosome. Similarly, a female must possess the ‘gene’ on both her X chromosomes. According to Prevent Blindness America, approximately 8 percent of males and less than 1 percent of females have color vision troubles (Bailey, Gretchyn, 2015). If a woman has one …show more content…

Our data graphically portrays the observed phenotypes of the offspring of parents with various allele combinations, presented as frequencies. Accordingly, colorblindness is an X-linked trait. If the dad is affected his genotype is NY, and the mom could be heterozygous (AY) or homozygous dominant (AA) for the trait. However, if the trait is rare then the carrier is heterozygous and unaffected, and she is most likely homozygous dominate for the trait.

The inheritance patterns graphically portrayed above for red-green color blindness can just as well coordinate with other sex-linked genes such as male pattern baldness. Typically, since sexlinked genes are only conveyed through the X chromosome, colorblindness is recessive to the gene with normal sight. Since males only have one X-chromosome they only have one sex-linked gene, therefore they are hemizygous. Meaning they only have a single copy of a gene rather than the ordinary two copies (Hemizygous, 2012). In terms of females, since they have two sex-linked genes, they are either homozygous or heterozygous. Homozygous labels a genotype with two identical alleles at a certain locus, while heterozygous labels a genotype containing a single print of a gene in a diploid organism. From the following genotypes: Genotype of affected male (AY), genotype of affected female (AA), genotype of non-affected female (NN), genotype of non-affected

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