Question

Which of the following are the banding techniques used in the case of a plant chromosome?
(a) G and R
(b) C and G
(c) C and N
(d) Q and G

Answer 1

Hint: The banding process in plant chromosomes allows us to analyze parts of chromosomes for inter and intraspecies comparison. This process is used to determine the amount and distribution of heterochromatin segments and phylogenetic relationships in different taxa from gymnosperm.

Complete step by step answer:
The C and N banding technique is used in the case of a plant chromosome.
The C band represents the constitutive heterochromatin and is used to identify different plant and animal species.
The N banding is present at the centromere, telomere, satellite, and the heterochromatic segment of the chromosome. This banding is used to find relationships between different taxa of gymnosperm.
Therefore, the correct answer is C and N.

Additional Information: Chromosome banding is a technique of staining chromosomes with chemicals and learning from it by how it stains.
More detailed information about each banding technique is given below-
C banding: Here C band represents the heterochromatin. We can identify different species of plants and animals with the help of C banding.
N banding: The N band is found in parts like satellite, telomere, centromere, and heterochromatic segments. It is used to distinguish the barley chromosome from the wheat chromosome in hybrids and to identify the translocation between the wheat and the barley chromosome.
G banding: G bands are used to bring out greater details in the C band. It is used mainly in the human chromosome and doesn't work on plant ones.
Q banding: This technique is used to identify human and mice chromosomes. It was developed by Casperson in 1968.
R banding: The R banding produces the reverse of G banding on chromosomes. It is also called reverse banding. Along with G banding, it is used to determine chromosomal deletion.

Note: Different banding techniques are used for the identification of chromosomes in plants and animals. However, G and R banding techniques don't work on plant chromosomes.