منابع مشابه
Cohesin and the Maternal Age Effect
During meiosis in human oocytes, chromosome nondisjunction increases with maternal age, leading to disorders such as Down's syndrome. In a recent study in Nature Genetics, Hodges et al. (2005) show that mice with a mutation in the meiosis-specific cohesin protein SMC1beta exhibit age-dependent defects in meiosis. These defects are similar to those observed in oocytes of older human mothers. The...
متن کاملThe Effect of Maternal Age on Childhood Asthma
Some studies indicate that children born to younger mothers are at a higher risk of wheezing and asthma. To investigate the maternal age associated with asthma in children, a case-control study on 310 asthmatic and 310 non-asthmatic children aged 3 to 4 years was organized during a one-year period. A questionnaire was used to obtain information about the child’s personal susceptibility factor...
متن کاملthe relationship between listening self efficacy, listening comprehension, gende, and age in male and female english learners
چکیده هدف اصلی تحقیق حاضر مطالعه و بررسی رابطه بین خودکارامدی شنیداری با درک شنیداری بود.همچنین رابطه درک شنیداری وخودکارآمدی شنیداری با جنسیت و رابطه خودکارامدی شنیداری با سن نیز مورد بررسی قرار گرفت.تعداد شصت زبان اموز-سی دختر و سی پسر- کانون زبان ایران در مرکز خرم آباد به صورت تصادفی انتخاب شدند. روشهای به کار رفته در جمع اوری داده ها عبارت بودند ازبرسشنامه خودکارآمدی و تست درک شنیداری لانگ...
15 صفحه اولthe evaluation of language related engagment and task related engagment with the purpose of investigating the effect of metatalk and task typology
abstract while task-based instruction is considered as the most effective way to learn a language in the related literature, it is oversimplified on various grounds. different variables may affect how students are engaged with not only the language but also with the task itself. the present study was conducted to investigate language and task related engagement on the basis of the task typolog...
15 صفحه اولThe influence of maternal age, spacing and number of pregnancies on birth weight and height
In this study the relation between maternal age, spacing number of pregnancies and birth weight and height was evaluated 1000 newborns in Fatemeh hospital in Hamedan. The growth parameters of newborns from mothers aged 18-35 years, were more than newborns from mothers under 18 or over 35 years. Also infants born from mothers, how had less than 24 months interval between pregnancies weight less...
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ژورنال
عنوان ژورنال: Cell
سال: 2005
ISSN: 0092-8674
DOI: 10.1016/j.cell.2005.10.018