PPT-Colorblindness

Ishihara Cards 2 Typically 5 of people cannot spot the hidden numbers in these cards Usually these 5 are males Pinning the Problem Down 3 The hidden number is in green The noise around it starts green but you mix in increasing amounts of red. Chromosome theory of inheritance. Genes located on chromosomes = gene locus. Thomas Hunt Morgan, Columbia Univ. “Fly room”. Drosophila. 100s of offspring. 2n = 8. 3 . prs. autosomes. X and Y sex chromosomes. Genes. for these . traits. are located . only. on the . X. chromosome (NOT on the Y chromosome). X linked alleles . always. show up in . males. whether . dominant. or . recessive. because males have only . Color Blindness. Discovery. John Dalton, an English chemist, was the first to report the disorder. . . . F. irst . general condition of color blindness was called . Daltonism. . Dalton believed that a colored liquid inside the . Color blindness. Color blindness was the chosen name since it affected the losing of one or some of the three color cones in the human eye which are red, green, and blue. It means human diagnosed with color blindness still can see color but is limited to the colors they can see. Some colors could be a total blind or in a different shade from the original.. J. ones, Coby Austin, Ellie Stiller, and Deon Robinson. Color Blindness: The history. A reduced ability to distinguish between certain colors.. Color blindness is also called color vision deficiency.. Human Genes and Chromosomes. Chromosomes 21 and 22 are the smallest human autosomes. Chromosome 22 has about 43 million DNA base pairs. Chromosome 21 has about 32 million base pairs. . Chromosome 22 has about 545 different genes. Genetic disorders tat occur on chromosome 22 are leukemia and neurofibromatosis (a tumor causing disease). There is also a long stretch of repeating DNA that does not code for proteins. . Human Inheritance. Disorders caused by individual genes - dominant. Individuals with the disorder only need 1 allele to have the disorder. Huntington’s Disease. Caused by a repeat of the sequence CAG . 2. Typically 5% of people cannot spot the hidden numbers in these cards. Usually, these 5% are males!!. Pinning the Problem Down. 3. The hidden number is in green. The noise around it starts green, but you mix in increasing amounts of red. Karyotype. Karyotype. – a . picture of . chromosomes. Autosomes. : the first 22 homologous pairs of chromosomes. . Autosomes . are the same for both males and females..  Sex chromosomes. : determines the sex of the individual. . Volume 2, Issue 4 , 2018, PP 1 - 6 ISSN 2637 - 5575 Journal of Zoological Research V2 ● I 4 ● 2018 1 P revalence of Color Vision defects ( CVD ) Among Adul