ANALYSES OF DIPLOTENE CHIASMA FREQUENCIES IN MOUSE OOCYTES AND SPERMATOCYTES IN RELATION TO AGING AND SEXUAL DIMORPHISM

被引:44
作者
JAGIELLO, G
FANG, JS
机构
[1] COLUMBIA UNIV,COLL PHYS & SURG,DEPT OBSTET & GYNECOL,NEW YORK,NY 10032
[2] COLUMBIA UNIV,COLL PHYS & SURG,INT INST STUDY REPROD,CTR REPROD SCI,NEW YORK,NY 10032
来源
CYTOGENETICS AND CELL GENETICS | 1979年 / 23卷 / 1-2期
关键词
D O I
10.1159/000131302
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Diplotene chiasma frequencies from 'early' (day 16) fetal oocytes are significantly greater than the average from 'late' (day 18) oocytes. A decrease in chiasma frequencies from both ages was found at diakinesis/MI in oocytes of young or old adult females, indicating a loss of chiasmata and/or terminalization. A greater number of type I univalents was found in 'late' oocytes than 'early' oocytes entering diplotene. No differences were found in chiasma frequencies of male diplotene spermatocytes studied at 23 days, 2 months, or 24 months of age. A greater chiasma frequency was generally found in the female than the male at all ages studied.
引用
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页码:53 / 60
页数:8
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