Question

A women with 47 chromosomes due to three copies of chromosome 21 is characterized by :

• A. Turner syndrome
• B. Down syndrome
• C. Super femaleness
• D. Triploidy

Answer 1

The correct option is B Down syndrome

Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by an error in cell division called "nondisjunction."
Nondisjunction results in an embryo with three copies of chromosome 21 instead of the usual two.
Children who have Down syndrome tend to have certain features, such as a flat face and a short neck. They also have some degree of intellectual disability.
Turner syndrome (TS), also known as 45,X or 45,X0, is a condition in which a female is partly or completely missing an X chromosome
Triploid syndrome, also called triploidy, is an extremely rare chromosomal disorder, in which a fetus has three copies of every chromosome instead of the normal two