How to find the gametes of a parent such as FfBB

Question

I don' know how to do it

Answer 1

Set up a table with 2 rows and 2 columns.  Put F above the first column and f above the second.  Put B next to the first row and B next to the second row.  In each box write the letters that correspond to it (row and column).  These are the possible gametes.