Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb ´ AaBb).In the figure above,how many plants would have purple flowers and tall stems?
A)1
B)3
C)5
D)9
E)16

Question

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb ´ AaBb).In the figure above,how many plants would have purple flowers and tall stems?
A)1 
B)3 
C)5 
D)9 
E)16

Quizplus · Accepted Answer

In a dihybrid cross, the ratio of offspring with the dominant phenotype for both traits is 9:3:3:1. This means that out of 16 offspring, 9 would have the dominant phenotype for both traits (purple flowers and tall stems). Therefore, the answer is 9.

Purple Flower (A)is Dominant Over White Flower (A),and Tall Stem