Question

In Down’s syndrome of a male child, the sex complement is
(a) XO
(b) XY
(c) XX
(d) XXY

Answer 1

XY is the correct answer

Answer 2

(b) XY.

Down syndrome is a type of birth defect that may happen due to an extra chromosome being there i.e., it is the chromosome number 21.

The three chromosomes 21 may be present in it and the condition is known as trisomy 21.

It is a form of the genetic disorder that happens due to the presence of a part of a third chromosome copy.

It is generally linked to moderate intellectual disability, growth delays and facial features abnormality.