Oldest Houses in the United States Richard Sparrow House. The Richard Sparrow House is an historic house at 42 Summer Street in Plymouth, Massachusetts and the oldest surviving house in Plymouth. The house was built around 1640 by Richard Sparrow, an English surveyor who arrived in Plymouth in 1636.
Fertilization: Sperm Penetrates Egg. It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter.At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl.he sperm can live up to 48-72 hours. Only a few hundred will even come close to the egg, because of the many natural barriers that exist in a woman's body. It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter.
First, ovulation (i.e., the monthly release of a woman's egg) must occur. Then, the egg must be fertilized. Fertilization describes the process by which a single sperm gradually penetrates the layers of an egg to form a new cell (zygote). This usually occurs in the fallopian tubes and can take up to 24 hours.