Sometimes cattle or even human beings give birth to their young ones that are having extremely different sets of organs like limbs/position of eye(s) etc. Comment.
Different types of chromosomes can be recognised by the position of the following separating the two arms
A complex of ribosomes attached to a singlestrand of $RNA$ is known as
Depending upon size and centromere position, the $46$ chromosomes have been divided into a number of groups