Yellow peas (Y) are dominant over green peas (y) and round peas (R) are dominant over wrinkled peas (r). Complete the dihybrid cross if two peas are crossed.

Answer 1

To complete the dihybrid cross, we need to determine the possible genotypes and phenotypes of the offspring.

Let's represent one parent as YyRr, where Yy represents yellow peas and Rr represents round peas.

The possible gametes the parent can produce are:
- YR
- Yr
- yR
- yr

Now, let's represent the other parent as YyRr as well.

The possible gametes the second parent can produce are the same:
- YR
- Yr
- yR
- yr

To complete the dihybrid cross, we need to combine these possible gametes from each parent.

The Punnett square for this dihybrid cross would be:

| YR | Yr | yR | yr
----------------------------------------------------
YR | YYRR | YYRr | YyRR | YyRr
----------------------------------------------------
Yr | YYRr | YYrr | YyRr | Yyrr
----------------------------------------------------
yR | YyRR | YyRr | yyRR | yyRr
----------------------------------------------------
yr | YyRr | Yyrr | yyRr | yyrr

Now, let's determine the genotypes and phenotypes of the offspring:

YYRR - Yellow, round peas
YYRr - Yellow, round peas
YyRR - Yellow, round peas
YyRr - Yellow, round peas
YYRr - Yellow, round peas
YYrr - Yellow, wrinkled peas
YyRr - Yellow, round peas
Yyrr - Yellow, wrinkled peas
YyRR - Yellow, round peas
YyRr - Yellow, round peas
yyRR - Green, round peas
yyRr - Green, round peas
YyRr - Yellow, round peas
Yyrr - Yellow, wrinkled peas
yyRr - Green, round peas
yyrr - Green, wrinkled peas

So, the dihybrid cross predicts that the offspring will have yellow and green peas along with round and wrinkled peas in a ratio of 9:3:3:1.