Down’s syndrome.

A Down syndrome will be

Correct the underlined portions. Down syndrome is caused by an extra chromosome 20.

How many Barr bodies are present in women with Down syndrome ?

underline("Down syndrome ") is an inherited blood disorder, in which the body makes an abnormal form of haemoglobin.

What is the diploid chromosome number in a person suffering from down syndrome ?

Match column I with column II and select the correct option from the given codes {:(,"Column I",,"Column II"),("A.","Chromosomal aberration","(i)","An additional sex chromosome"),("B.","Down' syndrome","(ii)","Inversion"),("C.","Klinefelter's syndrome","(iii)","Presence of an extra chromosome"),("D.","Turner's syndrome","(iv)","Absence of sex chromosome"):}