Biology for ( Grade 10 )

(Marvins-Underground-K-12) #1
Types of chromosomes.

14.1 (b) Size and Shape of Chromosomes :

Size of chromosomes greatly very during cell cycle.
(i) Interphase : It forms long thread like structure called as
chromatin.
(ii)Metaphase : Chromosomes are thickest and shorted and
therefore have definite shape and size. At this stage chromosomes
can be counted easily.
(iii) Anaphase : They have rod like J-shaped or V- shaped structures
during this phase.
(iv)Telophase : They have thread like structure.


Fig : To show condensation of chromatin network.
Free download pdf