Question

what is the phenotype of the box labeled x? t=tall, t=short b=black, b=white cross: ttbb x ttbb tb tb tb tb tb ttbb ttbb ttbb ttbb tb ttbb x ttbb ttbb tb ttbb ttbb ttbb ttbb tb ttbb ttbb ttbb ttbb tall black short black short white tall white

Explanation:

1. First, determine the genotype of box X. The row is Tb and the column is Tb, so the genotype is TTbb (by multiplying the alleles: T from row and T from column for the first gene, b from row and b from column for the second gene).
2. For the T - t gene: T is dominant (tall), and the genotype is TT, so the plant is tall.
3. For the B - b gene: B is dominant (black) and b is recessive (white). The genotype is bb, so the color is white.
4. Combining these, the phenotype is tall (from T) and white (from bb).

Answer:

tall white