COMING SOON! PQDT Open is getting a new home!

ProQuest Open Access Dissertations & Theses will remain freely available as part of a new and enhanced search experience at

Questions? Please refer to this FAQ.

Dissertation/Thesis Abstract

Investigation of the Cell Labeling Procedure and the Appearance of Monozygotic Twins
by Jim, Carol M., Ph.D., The George Washington University, 2015, 87; 3732515
Abstract (Summary)

The origins of pairs of monozygotic twins and higher order multiples, i.e. triplets, quadruplets, etc., have been extensively studied but still little is understood. To gain insight into this event, certain possible cell labeling schemes that model an organism’s development are analyzed. The phenomenon of quadruplet twins is exposed during the process. We predict that monozygotic quadruplets are not really quadruplets but instead are two pairs of monozygotic twins where the pairs slightly differ. From the considered models, the probability of monozygotic twins is found to be (1/2)K, and we discover from our analysis that the probability of monozygotic quadruplets, or triplets in the case of the death of an embryo, is (1/8)K, where K is a species-specific integer representing the number of pairs of homologous chromosomes. This investigation into twinning provides a foundation for understanding the process of cell development through which the cell development mechanism is established. The failure of the internal cellular clock from this mechanism may play an important role in cancerogenesis. The parameter K may determine cancerization with a probability threshold that is approximately inversely proportional to the Hayflick limit, so exposure to small levels of ionizing radiation and chemical pollution may not produce cancer.

Indexing (document details)
Advisor: Berkovich, Simon Y.
Commitee: Spector, Alexander, Youssef, Abdou S., Zhang, Nan
School: The George Washington University
Department: Computer Science
School Location: United States -- District of Columbia
Source: DAI-B 77/03(E), Dissertation Abstracts International
Subjects: Molecular biology, Cellular biology, Computer science, Oncology
Keywords: Cancerogenesis, Cell labeling, Internal cellular clock, Monozygotic twinning, Quadruplet twins
Publication Number: 3732515
ISBN: 978-1-339-19884-2
Copyright © 2021 ProQuest LLC. All rights reserved. Terms and Conditions Privacy Policy Cookie Policy