QQuestion
Establish the interrelationship between gene, DNA and chromosome. What are the advantages of vegetative propagation? [3 + 2]
✓Answer
Chromosomes are the gene-bearing nucleoprotein filaments present within the nucleus, endowed with heredity characters and composed of chromatin. Chromatin is a fine reticulum-like structure of DNA molecules wound tightly around histone proteins, existing as different folding states—loose as chromatin reticulum in interphase or highly condensed as chromosomes during division. DNA, a large double-helical biomolecule, is the stable genetic material carrying specific nucleotide sequences; each such sequence coding for a protein or trait is a gene, the basic physical and functional unit of heredity located at a specific position (locus) on the chromosome. Thus, DNA forms chromatin which condenses into chromosomes, and genes are linear segments of DNA on chromosomes determining phenotypic expressions like hair colour through genotype information.
Simple way
DNA (nucleotide sequences) → forms chromatin → condenses to chromosomes → carries genes linearly (Gene: unit of heredity on chromosome)
Vegetative propagation is a method of asexual reproduction in plants where new plants grow from parts of the parent plant.
Here are some advantages of vegetative propagation:
- Fast Growth: New plants can grow quickly as they are genetically identical to the parent and often well adapted to the environment.
- No Seeds Required: This method does not rely on seeds, which may be difficult to produce or may take a long time to germinate.
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