Understanding Dihybrid Crosses

What is the phenotypic ratio of a dihybrid cross?

• 9:3:3:1

• 1:2:1

• 1:1

• 3:1

Which traits are involved in the dihybrid cross discussed in the video?

• Leaf size and root length

• Stem thickness and leaf color

• Seed shape and seed color

• Flower color and plant height

How many different combinations are possible in the dihybrid cross discussed?

• 4

• 16

• 8

• 12

Which genotypic combination appears four times in the dihybrid cross?

• RrYy

• rryy

• RRYy

• RRYY

What is the final genotypic ratio of the dihybrid cross?

• 1:2:2:4:1:2:1:2:1

• 9:3:3:1

• 3:1

• 1:1:1:1