Learn to define synapsis. Find out what happens during synapsis in meiosis. Understand crossing over in meiosis and terms such as chiasmata,...
Sexual reproduction begins with conjugation (i.e. the pairing of two cells of different mating types) and meiosis of the micronucleus in each member of the conjugating pair (Fig. 1A). Eventually, one haploid micronucleus from each cell is transferred to the other cell; the haploid nuclei then...
A simplified mathematical model of tumor growth A one-dimensional model of tumor tissue growth is presented in which the source of mitotic inhibitor is nonuniformly distributed within the tissue (in contrast to many earlier models). As a result, stable and unstable regimes of growth b... JA ...
Based on this and on our own findings reported here, we propose that tethering of broken chromosomes during mitosis and meiosis may be an ancient and highly conserved function of MDC1. In this context, it is interesting to note that Mdb1, the S. pombe MDC1 ortholog, was recently shown ...
Mitosis Versus Meiosis Two types of cell division are mitosis and meiosis. In meiosis, a cell splits to form new cells with half the number of chromosomes of the original cell, and produce gametes for sexual reproduction. In mitosis, a cell splits to form two daughter cells, which are gen...
Discussions on the origin of sex typically overlook its association with protozoan entry into dormant walled cysts and the likely simultaneous coevolutionary, not sequential, origin of mitosis and meiosis. Results I elucidate nuclear and mitotic coevolution, explaining the origins of dicer and small ...