Dihybrid cross

Do you put the alleles on a Dihybrid Cross the same way you do with the Monohybrid Cross?

• Yes, just put the alleles straight on the punnett square the way they come.

• No, you must first segregate the gametes on the genotypet and make sure each square receives the correct combination.

Can you pridict the alleles for this parent?

• R, r, Y, y

• RY, Ry, rY, ry

• RR, rr, YY, yy

For parent 2 will it be the same or different?

• same

• different

How many potential offspring will have round and yellow seeds?

• 1

• 2

• 3

• 4

• 9

How many potential offspring will have round and green seeds?

• 1

• 2

• 3

Which letters from the genotype say "wrinkled"

• rr

• YY

• ry

• yy

• Ry

The PHENOTYPE of the last box is

• yellow and wrinkled

• yellow and round

• green and round

• green and wrinkled

What is the PHENOTYPIC RATIO of this dihybrid cross?

• 4:4:4:4

• 1:1:1:1

• 9:3:3:1

• 8:8

For these parents Your allele possibilities are still RY, Ry,rY,ry for the RrYy parent. But you will only need a 4X1 Punnett square (as opposed to the 4X4 square shown) because the second parents allele possibilities are 

• rr only

• yy only

• ry only

• RY only