What sequencing of heritage needs? (4)

I believe the answer is:

gene

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'what sequencing' is the definition.
I can't judge whether this defines the answer.

'of heritage needs?' is the wordplay.
'of' says the answer is hidden in the clue.
'GENE' can be found hidden inside 'heritage needs'.

Can you help me to learn more?

(Other definitions for gene that I've seen before include "Biological factor determining heredity" , "Part of chromosome" , "Part of DNA" , "affects someone's make-up" , "The Selfish -- (Dawkins)" .)

I've seen this clue in The Telegraph.

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