Step 1: Label your diagrams

Step 2: Write down the parental phenotypes

Step 3: Write down the parental genotypes

Step 3: Draw the gametes and circle them

Step 4: Draw a line from the first gamete of each parent and connect them at the bottom. Repeat this and connect the first gamete with the 4th gamete, 2nd gamete with the 3rd gamete, and 2nd gamete with the 4th gamete

Step 5: Label the connected points with the correct genotype and label it as "offspring genotype"

Step 6: below the offspring genotype, label the points with their phenotype and label this is "offspring phenotype"

Legend