Explanation:
On island A,
Parrots with Dd were released therefore these will mate with each other and will produce:
Dd x Dd
D d
D <em>DD Dd</em>
d <em>Dd dd</em>
Therefore, 25% DD, 50% Dd and 25% dd genotype parrot offspings will be produced.
On island B, parrots with DD and dd were released, therefore they will mate and will produce,
DD x dd
1. D D
d <em> Dd Dd</em>
d <em>Dd Dd</em>
2. DD x DD
D D
D <em>DD DD</em>
D <em>DD DD</em>
3. dd x dd
d d
d <em> dd dd</em>
d <em> dd dd</em>
This shows that there is a possibility on island A where 25% DD, 50% Dd and 25% dd genotype parrot offsprings will be produced whereas on island B, chances are almost equal as all three genotype parrot offsprings can be produced but the percentage could vary.