Question

Find the correct sequence of development of the offspring after fertilization.

• A. Embryo -> zygote -> foetus -> blastocyst
• B. Zygote -> blastocyst -> embryo -> foetus
• C. Zygote -> embryo -> blastocyst -> foetus
• D. Blastocyst -> zygote -> embryo -> foetus

Answer 1

The correct option is B

Zygote -> blastocyst -> embryo -> foetus

Soon after fertilization, a zygote is formed which develops into blastocyst after a couple of divisions; which then develops into different tissues and organs of the body. This developing stage is called embryo. The stage of the embryo in which all the body parts can be identified is called a foetus.