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| Author | Bryan Sykes |
|---|---|
Publication date | 17 May 2002 |
| ISBN | 0-393-02018-5 |
The Seven Daughters of Eve[1] is a 2001 semi-fictional book by Bryan Sykes that presents the science of human origin in Africa and their dispersion to a general audience.[2] Sykes explains the principles of genetics and human evolution, the particularities of mitochondrial DNA, and analyses of ancient DNA to genetically link modern humans to prehistoric ancestors.
Following the developments of mitochondrial genetics, Sykes traces back human migrations, discusses the "out of Africa theory" and casts serious doubt upon Thor Heyerdahl's theory of the Peruvian origin of the Polynesians, which opposed the theory of their origin in Indonesia. He also describes the use of mitochondrial DNA in identifying the remains of Emperor Nicholas II of Russia, and in assessing the genetic makeup of modern Europe.
The title of the book comes from one of the principal achievements of mitochondrial genetics, which is the classification of all modern Europeans into seven groups, the mitochondrial haplogroups. Each haplogroup is defined by a set of characteristic mutations on the mitochondrial genome, and can be traced along a person's maternal line to a specific prehistoric woman. Sykes refers to these women as "clan mothers", though these women did not all live concurrently. All these women in turn shared a common maternal ancestor, the Mitochondrial Eve.
The last third of the book is spent on a series of fictional narratives, written by Sykes, describing his creative guesses about the lives of each of these seven "clan mothers". This latter half generally met with mixed reviews in comparison with the first part.[2]
The seven "clan mothers" mentioned by Sykes each correspond to one (or more) human mitochondrial haplogroups.
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Phylogenetic tree of human mitochondrial DNA (mtDNA) haplogroups | |||||||||||||||||||||||||||||||||||||||
| Mitochondrial Eve (L) | |||||||||||||||||||||||||||||||||||||||
| L0 | L1–6 | ||||||||||||||||||||||||||||||||||||||
| L1 | L2 | L3 | L4 | L5 | L6 | ||||||||||||||||||||||||||||||||||
| M | N | ||||||||||||||||||||||||||||||||||||||
| CZ | D | E | G | Q | O | A | S | R | I | W | X | Y | |||||||||||||||||||||||||||
| C | Z | B | F | R0 | pre-JT | P | U | ||||||||||||||||||||||||||||||||
| HV | JT | K | |||||||||||||||||||||||||||||||||||||
| H | V | J | T | ||||||||||||||||||||||||||||||||||||
Sykes wrote in the book that there were seven major mitochondrial lineages for modern Europeans, though he subsequently wrote that with the additional data from Scandinavia and Eastern Europe, Ulrike (see below) could have been promoted to be the eighth clan mother for Europe.[5]
Others have put the number at 10[6] or 12.[7] These additional "daughters" generally include haplogroups I, M and W.[8] For example, a 2004 paper re-mapped European haplogroups as H, J, K, N1, T, U4, U5, V, X and W.[6] Richards, Macaulay, Torroni and Bandelt include I, W and N1b as well as Sykes' '7 daughters' within their 2002 pan-European survey (but - illustrating how complex the question can be - also separate out pre-V, HV1 and pre-HV1, and separate out U to include U1, U2, U3, U4 and U7 as well as U5).[9]
Likewise, Sykes has invented names for an additional 29 "clan mothers" worldwide (of which four were native American, nine Japanese[10] and 12 were from Africa[11]), each corresponding to a different haplogroup identified by geneticists: "Fufei, Ina, Aiyana/Ai, Yumi, Nene, Naomi, Una, Uta, Ulrike, Uma, Ulla, Ulaana, Lara, Lamia, Lalamika, Latasha, Malaxshmi, Emiko, Gaia, Chochmingwu/Chie, Djigonasee/Sachi, Makeda, Lingaire, Lubaya, Limber, Lila, Lungile, Latifa and Layla."[12]
Howy Jacobs in Nature labelled the book as semi-fictional with the majority of the information "the accounts of the imagined lives" of human ancestors. He commented: "All this made me feel that I was reading someone's school project, with influences from The Flintstones cartoon series, rather than a treatise by a leading academic."[2] Robert Kanigel in The New York Times asserted that making imaginary names and identities for the human ancestors is inappropriate as "neither solid theorizing nor fully realized fiction." He wrote: "Sykes's book is so fine, the science so well explained, the controversies so gripping, that it is painful to report that 200 pages into it the author performs a literary experiment that flops."[13]
Robin McKie in The Guardian concurred that the first part of the book is "an engrossing, bubbly read, a boy's own adventure", while the latter stories "try to pass off fiction as science."[14] Erika Hagelberg in Heredity said the book "aimed at the punter" and does not picture an "accurate account of an inspiring field of science;" commenting: "the tedious narrations of the lives of the clan mothers, lack of bibliography, and casual treatment of facts, rules the book out of the category of serious popular science."[15]