any idea for a research topic in cancer and genetics department, applying for a PhD, clueless about research topic :( MSc research was done on Diabetic Nephropathy.

Use scholar.google.com to search for a few of the topics you are interested in, find a few research articles to study. This way, you may narrow down to a topic of your liking.

Can jet lag or irregular sleep cause cancer? :)

Thank you for your reply. @ Meaninglife That's sounds like a very interesting topic... I am thinking of Diabetes Mellitus and breast cancer.. hope its works. Thanks again.

Research shows that there is increase risk of breast cancer in flight attendants due to lack of sleep and jet lag...

Hi Scitech

In the UK at least, it is unusual for a science student to propose their own thesis topic, rather than apply for an already funded topic.

However, I would suggest looking at departments whose work interests you, read some papers by the staff there, and see if that inspires you. It is easier to develop hypotheses/research questions on the basis of well defined gaps in the knowledge (as are sometimes detailed in the discussions sections of papers) than it is to come up with something from scratch.