The sequence of development for the fertilized egg is
A) fertilization, zygote, morula, implantation, and blastocyst.
B) fertilization, zygote, morula, blastocyst, and implantation.
C) fertilization, zygote, blastocyst, morula, and implantation.
D) fertilization, zygote, blastocyst, implantation, and morula.

Question

Quizplus · Accepted Answer

After fertilization, the egg undergoes multiple rounds of cell division to form a zygote, which then develops into a morula (a solid ball of cells). The morula then develops into a blastocyst (a hollow ball of cells with an inner cell mass), which implants itself into the uterus. Therefore, the correct sequence is fertilization, zygote, morula, blastocyst, and implantation, which is described in option B.

The Sequence of Development for the Fertilized Egg Is