Explanation:
<h3><u>If the genes were linked:</u></h3>
<u>Parental cross: EW/EW X ew/ew</u>
F1 genotype: EW/ew
F1 Gametes:
- Parentals (more abundant): EW and ew
- Recombinant (less abundant): Ew and eW
<u>Test cross: EW/ew X ew/ew</u>
<u>F2 genotypes:</u>
- Parentals: EW/ew; ew/ew;
- Recombinant: Ew/ew; eW/ew
<h3><u>If the genes are not linked:</u></h3>
<u>Parental cross: EEWW X eeww</u>
F1 genotype: EeWw
F1 gametes: EW, Ew, eW, ew. Genes assort independently, so all of the possible gametes of the F1 individual will have the same probability.
<u>Test cross: EeWw X eeww</u>
<u>F2 genotypes:</u>
- 1/4 EeWw, 1/4 Eeww, 1/4 eeWw, 1/4 eeww