Question

Briefly explain the events of fertilisation and implantation in an adult human female.

Hint:

Fertilization takes place in the fallopian tube, while implantation occurs in the uterus, where the embryo embeds itself into the uterine lining for further growth.

Answer 1

Step 1: Fertilization.
Fertilization in humans occurs when a sperm cell from the male merges with an egg cell from the female, usually in the fallopian tube. This results in the formation of a zygote, which contains the complete set of chromosomes.
Step 2: Formation of Blastocyst.
The zygote divides through mitosis to form a blastocyst, which is a ball of cells. The blastocyst travels through the fallopian tube to the uterus.
Step 3: Implantation.
Once in the uterus, the blastocyst attaches to the uterine lining (endometrium). This process, called implantation, is essential for the embryo to receive nutrients and oxygen from the mother for further development.