Are there any crucial differences between the patent regime in US vs India? We may be filing for one in India & of course, the attorneys will be doing the heavy lifting; but I just was curious about any major differences.

e.g. About allowable claims, form, term etc.

Some specific questions:

• Is the patent term 20 years in India too?
• Any differences in claims language or the breadth of claims allowed?
• Are prophetic experiments allowed in place of actual experiments?
• Are biotech patents allowed to patent the gene itself or merely a method that uses / synthesizes the gene?

In case it matters, this is a biotech patent about a transgenic organism.