You are studying tail color in Hagrids favorite blastended s

You are studying tail color in Hagrid\'s favorite blast-ended skrewt population because he wants to breed them for specific tail colors. Knowing that skrewt tails may be either yellow, brown, or white, and that the brown (B) and white (W) alleles are incompletely dominant, you tell him that you can help. Hagrid wants to have a stock of pure-breeding yellow-tailed skrewts. How can he achieve this?

Solution

In incomplete dominance F1 generation did not resemble either of the parents. Both trailts are not fully expresed so combination of both traits gives a new traits.

Cross between Brown and While tail skrewt.

                                                       BB * WW

                                                       BW (Yellow)