In human fertilization, two 1n haploid cellsâan ovum (female gamete) and a sperm cell (male gamete)âcombine to form a single 2n diploid cell called the zygote.NA is then replicated in the two separate pronuclei derived from the sperm and ovum, making the zygote's chromosome number temporarily 4n diploid. After approximately 30 hours, fusion of the pronuclei and subsequent mitotic division produce two 2n diploid daughter cells called blastomeres.
The Delta Force was secretly created in October 1977 by US Army Colonel Charles Beckwith in direct response to numerous, well-publicized terrorist incidents that occurred in the 1970s. From its beginnings, Delta Force was heavily influenced by the British Special Air Service.
Registration for the 27th Annual Delta Days in the Nation's Capital is now open, please Click here to register. | Who Speaks for Delta. Click here to read important correspondence. | Delta Sigma Theta Sorority, Inc. was founded on January 13, 1913 by 22 collegiate women at Howard University to promote academic excellence and provide assistance to those in need.