Published online by Cambridge University Press: 05 June 2012
Introduction
In 1973, a chapter entitled ‘The use of genetic markers of the blood in the study of the evolution of human populations’, was published in the first volume that attempted to synthesize the field of anthropological genetics (Crawford, 1973). This chapter defined genetic markers as "discrete segregating, genetic traits which can be used to characterize populations by virtue of their presence, absence, or high frequency in some populations and low frequency in others' (Crawford, 1973: 38). This definition similarly applies to molecular markers, which are segregating regions of DNA, present in some populations but absent or infrequent in others. The 1973 chapter summarized the available genetic markers of the blood that could be used for the measurement of evolutionary processes and the characterization of human population structure. The list of available polymorphic loci included 16 blood groups, 11 red blood cell proteins, 10 serum proteins and 3 white cell and platelet systems. These ‘riches’ of available variation of the blood followed 70 years of research on the blood group systems (since Karl Landsteiner's original work in 1900), and Oliver Smithies (1955) development of zone electrophoresis for the separation of specific proteins from mixtures such as the serum of the blood (Landsteiner and Levine, 1927). At the time the first volume in anthropological genetics was compiled, the physiological functions of blood groups were unknown, other than their involvement in blood transfusion and some suspect statistical associations with disease.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.