Question

Zygote divides to form ……….which is implanted in uterine wall

Hint:

The blastocyst consists of an outer layer called the trophoblast and an inner cell mass which later differentiates into the embryo.

Answer 1

Step 1: After fertilization, the zygote undergoes rapid mitotic divisions called cleavage as it moves through the fallopian tube toward the uterus.
Step 2: It passes through the morula stage (8–16 cells) and finally transforms into a blastocyst.
Step 3: It is the blastocyst stage that attaches to and becomes embedded in the endometrium of the uterus, a process called implantation.