What does the cryptic crossword clue "Broadcast on genes the historical building blocks? (10)" mean?

This cryptic clue uses wordplay to arrive at the answer. Visit the page for progressive hints — definition, wordplay type, and a full step-by-step explanation.

Broadcast on genes the historical building blocks? (10)

Independent Cryptic #12094 | 29 Across | 2025-07-14 flower

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