Question

Embryonic stem cells (ES) are isolated and are injected again into the blastocoel of a developing embryo. The embryo which develops is entirely made up of these cells only.

(a) True

(b) False

This question was addressed to me in class test.

My doubt is from Generation of Transgenic Organsims topic in section Using Other Organisms of Genetic Engineering

Answer 1

The correct answer is (b) False

For explanation: ES cells are isolated and are injected into the blastocoel of the developing embryo. But the embryo is not composed wholly of ES cells and thus it is said to be chimeric.