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In birds, males carry two identical sex chromosomes (ZZ), and females carry two different sex chromosomes (ZW). A gene in parakeets called cinnamon is sex-linked recessive on the Z chromosome.

If a cinnamon male is crossed with a normal female, what percentage of the offspring will be cinnamon?


All of the males only.


All of the females only.


All of the offspring.


None of the offspring.

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