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House of Lords written question – answered on 16th July 2003.

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Photo of Lord Lucas Lord Lucas Conservative

asked Her Majesty's Government:

Whether the average degrees of consanguinity between brother and half-sister, and that between blood uncle and niece, are identical.

Photo of Lord Warner Lord Warner Parliamentary Under-Secretary, Department of Health, Parliamentary Under-Secretary (Department of Health)

The average degree of consanguinity between brother and half-sister is equivalent to that between blood uncle and niece. In both cases, on average the two related individuals will have one quarter of their genes in common.

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