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.
Implantation is the process by which a fertilized ovum (egg) implants into the uterine wall to obtain oxygen and nutrients from the mother. This usually occurs between 6 and 8 days after conception.Conception itself can occur anywhere between a few hours and 5 days after intercourse.This is because sperm can live inside your uterus and fallopian tubes for up to 5 days.If during that period you ovulate (release and egg from your ovary), then the sperm can come into contact with the ovum to make an embryo.his is because sperm can live inside your uterus and fallopian tubes for up to 5 days. If during that period you ovulate (release and egg from your ovary), then the sperm can come into contact with the ovum to make an embryo.