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
As in all other organisms reproduction is the formation of new individuals of the same species. Sexual. reproduction is the only method of reproduction in our species. Sexual reproduction involves the fusion of specialised haploid sex cells.The fusion of sperm and egg cell is called fertilisation. Fertilisation results in the formation of a diploid zygote from which a new individual develops.s in all other organisms reproduction is the formation of new individuals of the same species. Sexual. reproduction is the only method of reproduction in our species. Sexual reproduction involves the fusion of specialised haploid sex cells.