Discussion Topic - Essay ExampleTwo common genes that undergo mutation to result in achromatopsia are CNGB3 and CNGA3. Four chromosomes might have changes responsible for achromatopsia. These chromosomes are chromosome 14, chromosome 8q21-q22, chromosome 2q11, and chromosome 10q24.A mutation that causes this disorder was discovered through a comparative positional cloning approach. The locus of the disorder is in a region of chromosome CFA29. The homologous region on the human genome has the gene for cyclic nucleotide-gated channel beta subunit. Mutation causes same disorders in human beings. The mode of inheritance for this disorder is autosomal recessive. Some chromosomal information is lost or deleted through the process of converting DNA to amino acids (Parker, 2004).A scientist known as Punnet in 1993 discovered the trait for blue egg. This trait was mapped on chromosome GGA1 to a region from 67.3-69.1. Dongxiang chicken breed was used to discover this trait.
