Nucleosomes are bounded by

Which type of chromosome is represented by the given figure?

Due to the position of the centromere, an $L$-shaped chromosome is called:

In the given figure,what does $C$,which is associated with the transport of $m-RNA$,represent?

Polytene chromosomes in the salivary glands of Dipteran larvae are useful in gene mapping because they ..........

Which of the following are used to define the karyotype of a species?
$1$. The number of chromosomes
$2$. The chromosome length
$3$. The positions of the centromeres