Question 14

The initial cell that contains the genetic information of both parents is the zygote.

The zygote is the first cell formed when a sperm fertilizes an egg, combining genetic material from both parents and thus serving as the initial cell with the complete set of genetic information.

A) Embryo

The embryo refers to the early stages of development following the zygote stage, where cellular division and differentiation occur. While it contains genetic information, it is not the initial cell that combines the genetic contributions from both parents.

B) Trophoblast

The trophoblast is a layer of cells that will eventually form part of the placenta. It arises from the blastocyst stage and is involved in implantation, but it does not represent the initial cell containing genetic information from both parents.

C) Blastocyst

The blastocyst is a structure formed in the early development of mammals, consisting of an inner cell mass that will develop into the embryo and an outer layer called the trophoblast. However, it is not the initial cell; that role belongs to the zygote.

D) Zygote

The zygote is indeed the initial cell created from the fusion of a sperm and an egg, containing the complete genetic information from both parents. This makes it the correct answer to the question.

Conclusion

The zygote is definitively the correct answer as it is the very first cell resulting from fertilization, incorporating genetic material from both the mother and the father. All other options describe stages or structures that follow the zygote and do not represent the initial combination of parental genetic information.