Question
To ask Her Majesty’s Government, further to the Written Answer by Lord Marland on 5 December 2012 (WA 158–9), whether the pronuclei are the nuclei of the gametes within the embryo and are therefore DNA-containing nuclei.[HL4559]
Answer
The department has sought advice from medical researchers through the Medical Research Council. The pronuclei are unique entities, they exist only in the zygote. The female pronucleus contains the nuclear DNA from the egg and the male pronucleus contains the nuclear DNA from the sperm.