Npgrj_ng_2116 1251..1255
نویسندگان
چکیده
Large data sets on human genetic variation have been collected recently, but their usefulness for learning about history and natural selection has been limited by biases in the ways polymorphisms were chosen. We report large subsets of SNPs from the International HapMap Project1,2 that allow us to overcome these biases and to provide accurate measurement of a quantity of crucial importance for understanding genetic variation: the allele frequency spectrum. Our analysis shows that East Asian and northern European ancestors shared the same population bottleneck expanding out of Africa but that both also experienced more recent genetic drift, which was greater in East Asians.
منابع مشابه
بررسی دلایل ناکامی محمدشاه قاجار در اعادۀ حاکمیت ایران بر شهر هرات (1255- 1251 ﻫ/ 1839-1835م)
سرپیچی کامران میرزا حاکم هرات از انجام تعهداتی چون پرداخت خراج سالیانه، تهاجم به خراسان و تلاش برای تصرف سیستان، از جمله عواملی بود که محمد شاه را واداشت تا با لشکرکشی به هرات، هم کامران میرزا را تنبیه کند و هم این شهر را که وی در زمان حیات پدر تا چند قدمی فتح آن پیش رفته بود، مفتوح نماید. در این زمان از یک سو دولت روسیه تلاش میکرد تا شاه قاجار را برای حمله به هرات تحریک و تشجیع نماید و در ص...
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