The upcoming discussion will update you about the differences between Polyteny and Polyploidy.
Difference # Polyteny:
1. Homologous chromosomes undergo somatic pairing.
2. The products of polyteny remain attached to one another.
3. Polyteny produces hundreds of copies of the same chromosome.
4. Polytene chromosomes are visible in the interphase nucleus.
5. Polytene cells cannot multiply. They are destined to die.
Difference # Polyploidy:
1. Pairing of homologous chromosomes does not occur in somatic cells.
2. Similar chromosomes remain separate from one another.
3. Polyploidy does not increase in number of chromosomes beyond 6-10 times.
4. Chromosomes are not visible in the interphase nucleus.
5. Polyploid cells behave like normal cells.