What is trisomy 21?

Mention the symptoms seen in trisomy 13/ Patau's syndrome.

Pick out the correct statement. (i) Karyotyping helps in gender identification (ii) Holandric genes are located on X- chromosome (iii) Trisomy- 21 is an allosomal abnormality (iii) Cooley's anaemia is an autosomal recessive disorder

Comment on Trisomy-21

The diameter of a lead ball is 2.1 cm The density of the lead used is 11.34 g//c^(3) What is the weight of the ball ?

Monosomic trisomy is represented as

The equation of a straight line through (2,1) with equal intercepts on the coordinate axes is :

Coefficient of variation of two distributions are 60 and 70, and their standard deviations are 21 and 16, respectively. What are their arithmetic means.