EGL USA is one of the largest and oldest independent gemological institutions focusing on gemstone certification and research. Originally part of an international network founded in Europe in 1974, EGL USA opened its first U.S. lab in the heart of New York's international diamond and jewelry district in 1977.
the fusion of the nucleus of a haploid sperm cell and the nucleus of a haploid egg cell, forming a diploid zygote zygote diploid cell formed when the nucleus of a haploid sperm cell fuses with the nucleus of a haploid egg cell tetrad group of four chromatids formed during prophase I of meiosis by the two sister chromatids in each of the two homologous chromosomes
fertilization-the fusion of two haploid gamete nuclei and cells (egg and sperm) which forms a diploid zygote. flagellum-long whip-like tail protruding from the surface of a cell that propels the cell, acting as a locomotive device. gamete-a specialized sex cell such as an egg or a sperm, which is haploid.eiosis-the type of cell division that occurs in sex cells during gamete formation; the diploid parent cell undergoes two rounds of division, generating a total of four daughter cells, each of which is haploid and genetically unique.