AP PSYCHOLOGY

Detailed explanation-1: -The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus. During the first week after conception, the zygote divides and multiplies, going from a one-cell structure to two cells, then four cells, then eight cells, and so on.

Detailed explanation-2: -The zygote phase is short, lasting only around four days, after which its cells rapidly divide to become a blastocyst. The blastocyst develops around the fifth day following fertilization as the zygote travels down the fallopian tube toward the uterus.

Detailed explanation-3: -The zygote spends the next few days traveling down the fallopian tube. During this time, it divides to form a ball of cells called a blastocyst. A blastocyst is made up of an inner group of cells with an outer shell. The inner group of cells will become the embryo.

Detailed explanation-4: -The zygote phase is brief, lasting only about four days. Around the fifth day, the mass of cells becomes known as a blastocyst. The embryo develops from the blastocyst.

Detailed explanation-5: -Week 3: Fertilization The sperm and egg unite in one of your fallopian tubes to form a one-celled entity called a zygote. If more than one egg is released and fertilized or if the fertilized egg splits into two, you might have multiple zygotes.