Constitution of the United States of America (1787). Download PDF of the Constitution. The Constitution was written in the summer of 1787 in Philadelphia, Pennsylvania, by delegates from 12 states, in order to replace the Articles of Confederation with a new form of government.
Gametes have a haploid number (23). When conception occurs, a human sperm and ovum combine their chromosomes to make a zygote (fertilized egg) with 46 chromosomes. This is the same number that the parents each had in their somatic cells. In doing this, nature is acting conservatively. Each generation inherits the same number of chromosomes.
Visualized at the molecular level, genetic material from the egg and a single sperm combines to form a new human being. ---. Transcript: Fertilization is the epic story of a single sperm facing incredible odds to unite with an egg and form a new human life.It is the story of all of us.During sexual intercourse, about 300 million sperm enter the vagina.ome sperm remain behind, caught in the folds of the cervix, but they may later continue the journey as a backup to the first group. Inside the uterus, muscular uterine contractions assist the sperm on their journey toward the egg.