A zygote (from Greek ζυγωτός zygōtos "joined" or "yoked", from ζυγοῦν zygoun "to join" or "to yoke"), is the initial cell formed when two gamete cells are joined by means of sexual reproduction. In multicellular organisms, it is the earliest developmental stage of the embryo. In single-celled organisms, the zygote divides to produce offspring, usually through Mitosis, the process of cell division.
It looks into the techniques used in in-vitro fertilization treatment and explains embryo transfer and storage, egg donation, and reproductive technologies. It also considers the ethics surrounding groundbreaking stem-cell research, surrogacy, frozen embry..
It is almost impossible to imagine modern life without this device; yet, for the first thirty years or so, from its patent in the late nineteenth century, it represented no real advantage over traditional fasteners like the hook-and-eye or the old-fashione..
The origin of this appeal might be traced to the early Christian proscription of tattooing and the resulting European laws against the practice. Whatever the source, tattooing today has an aura of the forbidden about it. Second, tattooing may have inherent..
This book re-establishes the relevance of mainstream anthropological (and sociological) approaches to development processes and simultaneously recognizes that contemporary development ought to be anthropology's principal area of study. The introduction pro..
From Heidi Murkoff, author of America's bestselling pregnancy and parenting books, comes the must-have guide every expectant couple needs before they even conceive—the first step in What to Expect: What to Expect Before You're Expecting.An estimated 11 m..
While their mother recovers from an illness Satsuki and her little sister Mei (voiced in English by Dakota Fanning and Elle Fanning) get away from it all in an idyllic rural retreat. Far from the bustle of the city they discover a mysterious place of spi..