Gene tech

Question 1

Microinjection of DNA into fertilised egg cells is a frequent method of producing
transgenic fish. However, the insertion of the transferred gene into nuclear DNA may
be delayed. Consequently, the offspring of transgenic fish may not possess the
desired characteristic.

Suggest and explain how delayed insertion of the GH gene could produce offspring of
transgenic fish without the desired characteristic. (2 marks)

Answer 1

Cell division has occured before gene added.
Cells producing gametes do not receive the gene.