Answer to Question 1
One of the best understood examples of a single gene condition is phenylketonuria (PKU), a rare disorder occurring in approximately 1 in 15,000 individuals (Waisbren, 2011). Unlike chromosomal abnormalities that cause Down syndrome, the cause of PKU is a recessive gene transmitted by typical Mendelian mechanisms.
Answer to Question 2
The most common disorder that results from a chromosome abnormality is Down syndrome. These abnormalities also can occur in the number of sex chromosomes, resulting in intellectual disability syndromes such as Klinefelter's (XXY, a disorder in which males have an extra X chromosome) and Turner's (XO, a disorder in which women are missing a second X chromosome).
Unique communities may result from distinct environmental conditions.
Sickle cell anemia. The clinical manifestations of sickle cell anemia result from pathologic changes
As a result of this change, deoxyhemoglobin S
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
Two transesterification reactions that result in splicing of exons in pre-mRNA
Both students with intellectual disability (ID) and students who are intellectually gifted need ...