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
The only exception is sperm or eggs which. are produced by a different type of cell division called meiosis. During fertilization the sperm and egg unite to form a single cell called the zygote which contains. chromosomes from both the sperm and egg. The zygote undergoes mitosis to begin development of. the human embryo which eventually becomes a baby. Why your body can not use mitosis to make sperm or eggs.