One of the nondisjunction is trisomy 21 or also known as Down’s syndrome. In 1866 John Langdon Down wrote a paper about Down syndrome, but only talked about the observable trait of this nondisjunction. Also the life expectancy at the year 1910 to those who had it, only live up to the age of 10 but in modern day, the life expectancy increased to the age of 60 depending on health problem and therapy. This nondisjunction occurs in anaphase I where the homologous pairs did not separate properly, leading to having an extra chromosome in two gametes and missing a chromosome in the others. In trisomy 21 case, an extra chromosome is found on chromosome 21 and thus causing cells to have difficulty in regulating the amount and type of protein that was made. Those with trisomy 21, exhibit a flat face with small broad nose and their ears are irregularly shaped. There are other distinguishable appearance for those who have trisomy 21 but these are the most
One of the nondisjunction is trisomy 21 or also known as Down’s syndrome. In 1866 John Langdon Down wrote a paper about Down syndrome, but only talked about the observable trait of this nondisjunction. Also the life expectancy at the year 1910 to those who had it, only live up to the age of 10 but in modern day, the life expectancy increased to the age of 60 depending on health problem and therapy. This nondisjunction occurs in anaphase I where the homologous pairs did not separate properly, leading to having an extra chromosome in two gametes and missing a chromosome in the others. In trisomy 21 case, an extra chromosome is found on chromosome 21 and thus causing cells to have difficulty in regulating the amount and type of protein that was made. Those with trisomy 21, exhibit a flat face with small broad nose and their ears are irregularly shaped. There are other distinguishable appearance for those who have trisomy 21 but these are the most