CLASS-X & XIBIOLOGY CHROMOSOME & DNA /BIOLOGY

, , , -

-DNA -DNA -DNA- -DNA-

(d)Sub-Metacentric - , 46 44 - -

X Y - X X DNA RNA

(core substance) DNA DNA -

(

) H1 200

,

-H1, H2A,H2B, H3 H4HMG-14 HMG-17

DNA (- ) RNA ( ) 90 % DNA 10 % RNA

DNA1. - (S) 2. - (i) (A) (G)

(ii)- (C) (T) 3. (P)

sPDNA + =

+ =

DNA

DNA ( )

KAMINI KUMAR SINGHA MEMORIAL H/S SCHOOL. AGARTALAPREPARED & PRESENTED BY--SANJIB ROY Assistant teacher