نتایج جستجو برای: triploidy
تعداد نتایج: 1050 فیلتر نتایج به سال:
The kidney tissue of a single individual of the California minnow Gila bicolor (Girard) contained polyploid cells in about 1.7% frequency. Chromosome spreads of triploid, tetraploid, hexaploid, octaploid, and dodecaploid cells were observed and may have arisen thmugh endoreduplication of ancestral diploid and triploid cells. The cytological mechanism producing the triploid cells is unknown. Dip...
Karyological and flow cytometric (FCM) analyses were performed on a group of 14 green toads of the Bufo viridis species from seven Eurasian populations. Both approaches gave concordant results concerning the DNA ploidy level. All the populations examined were represented exclusively by diploid or tetraploid specimens, except one, where triploids were found. Results evidenced an interpopulation ...
Hydatidiform moles (HMs) are abnormal human pregnancies with vesicular chorionic villi, imposing two clinical challenges; miscarriage and a risk of gestational trophoblastic neoplasia (GTN). The parental type of most HMs are either diandric diploid (PP) or diandric triploid (PPM). We consecutively collected 154 triploid or near-triploid samples from conceptuses with vesicular chorionic villi. W...
Sir It has been estimated that 25-40% or more pregnancies end in spontaneous abortions and that at least 80% happened in the first trimester!. There are many causes of spontaneous abortion, but it is now known that about 60% of abortuses expelled spontaneously in the first trimester are chromosomally abnormaF. The types of chromosomal abnormality usually found in abortuses are autosomal trisomy...
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