When usingthe standard proteins it is typically assumed that the vv values of thestandard and actually measured protein are identical. With thisassumption, the ratio of the molecular masses of the two proteins isidentical to the ratio of their I(0)s normalized against the concen-trations.
The gametes (an egg and a sperm) fuse in the process of syngamy to form a 2 n zygote. The zygote divides mitotically to form a multicellular embryo ( embryogenesis), which is protected by either gametophytic tissues (such as remnants of archegonia in the nonseed land plants) or sporophytic tissues (the seed in the seed plants). An embryo,...
The origin of embryonic stem cells. Embryonic stem cells are grown from cells found in the embryo when it is just a few days old. In humans, mice and other mammals, the embryo is a ball of approximately 100 cells at this stage.It is known as a blastocyst and has two parts:1  An outer layer of cells, or trophectoderm, will form the placenta that supports the embryo as it grows inside the uterus. 2  An inner clump of cells, called the inner cell mass, is a ball of 10â20 cells. 3  These cells are undifferentiated, or unspecialized.t is known as a blastocyst and has two parts: 1  An outer layer of cells, or trophectoderm, will form the placenta that supports the embryo as it grows inside the uterus. 2  An inner clump of cells, called the inner cell mass, is a ball of 10â20 cells. 3  These cells are undifferentiated, or unspecialized.