4. Do cells which lack normal cell cycle control (cancerous cells) exhibit karyotypes that look physically different than cells with normal cell cycle control?

Yes they do.

Explanation:

Cells which lack normal cell cycle exhibit karyotypes that look physically different than cells with normal cell cycle control.

Lack of normal cell cycle control means that there normal regulations that limit cell replication are either disfunctional or absent.

In cells with normal cell cycle control, there is limited cell multiplication thereby, normal growth.