Autism Spectrum Disorder

1278 Words Feb 20th, 2018 5 Pages
ASD’s gender proportion suggests that the autism is sex-linked, and the statistical evidence convincingly shows that genetic factors are playing key role in the prevalence of ASD. To begin with, U.S. Department of Health and Human Services, Centers for Disease Control and Prevention (CDC) published the relationship between the number of autistic boys and girls. The statistical evidence shows that boys are more inclined to become autistic than girls. CDC states that 1 in 42 boys and 1 in 189 girls were identified as having ASD. This observation shows that ASD is likely a sex-linked inheritance. Sex-liked inheritance is defined as a pattern of inheritance characteristic of genes located on the sex chromosomes of organisms having a chromosomal mechanism for sex determination (Sadava et al., 2014). If the ASD was sex-linked inheritance, the ratio between male and female exhibiting the phenotype would result in 3 to 1 under the normal curve. The ratio between boy and girl is approximately 5 to 1, which shows that there is a strong association between sex-linked inheritance and ASD. For this reason, it is reasonable to conclude that ASD is primarily influenced by the genetic factor, which is prenatal. On the other hand, some behavioral psychiatrists would argue that the conclusion is inaccurately determined, since the genetic mutation would not occur within a decade. As indicated in Appendix C: Table 1, the rate at which the number of ASD children increase…
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