Cross (parent 1) aaBbCc X (parent 2) AabbCC.

Question

What proportion of offspring will have the same phenotype as parent #2?

Answer 1

Look at the individual genes and see what proportion will have the same phenotype as parent two, then multiply them together.  We're looking for AxbbCx, where x indicates either dominant or recessive.

 

aa x Aa = 2/4 Ax

Bb x bb = 2/4 bb

Cc x CC = 4/4 Cx

2/4 x 2/4 x 4/4 = 1/4

 

So one in four will have the same phenotype, though not necessarily the same genotype.