Cell within the developing embryo. Each blastomere is capable of developing into an identical embryo until the embryo reaches about the 30-cell stage, after which the cells begin to differentiate into specific tissues.
Any of the cells in the early embryo produced as the results of cell division in the fertilised egg. A blastocyst is made up of many blastomeres. Bt toxins Insecticidal proteins produced by the soil micro-organism called Bacillus thuringiensis. Bt is an abbreviation of the name Bacillus thuringiensis. Bt crops Crop plants that contain genes for Bt toxins. Examples are BollgardÂ® cotton and IngardÂ® cotton.
One of the cells in an early embryo. Cervical mucus Mucus produced by the cervix which permits passage of sperm to the uterus and fallopian tubes. This mucus changes in volume and quality at the time of ovulation.
A single cell within a pre-implantation embryo up to the morula stage of development. Each blastomere is totipotent and has the ability to develop into a whole embryo if it was removed and grown on its own.