Question

Which of the following banding groups is used in staining both plant and animal chromosomes?
A. C-group
B. G-group
C. M-group
D. Q-group

Answer 1

Hint: There are different chromosome banding techniques used in cytogenetics. One of the above mentioned banding groups can be used for staining chromosomes of both plant and animal species.

Complete step by step answer:
-The majority of traditional cytogenetic research is based on banded metaphase chromosome karyotyping. A band is classified as that part of a chromosome which, with one or more banding techniques, is clearly distinguishable from its adjacent segments by appearing darker or brighter. The pattern used to dye the chromosomes of plants and animals is C group banding.
-A technique used in cytogenetics to create a visible karyotype by staining condensed chromosomes is G-banding (Giemsa banding). Through the photographic representation of the entire chromosome complement, it is possible to classify genetic disorders.
-Heterogeneous chromosome banding technique based on staining with quinacrine dihydrochloride is called the Q-banding. Q-banding makes it possible to classify the various chromosome pairs precisely and to identify structural chromosome rearrangements as well.

So, the correct option is A. C-group.

Note:
Chromosome banding is the lengthwise variation in staining properties along a chromosome, usually independent of any immediately apparent structural variation, and thus excludes patterns that have a morphological aspect, such as those seen on Drosophila polytene chromosomes.