A biotechnology company produces a cloned calf using somatic cell nuclear transfer (SCNT). A somatic cell is harvested from a high-yielding Holstein-Friesian cow (Donor A), its nucleus is removed and inserted into an enucleated oocyte from a Jersey cow (Donor B), and the resulting embryo is implanted into a Hereford cow (Surrogate C).
Which of the following statements about the cloned calf is correct?
The cloned calf will share 100%100\%100% of its total DNA (nuclear and mitochondrial) with Donor A.
The cloned calf possesses nuclear DNA identical to Donor A, but its mitochondrial DNA is identical to Donor B.
Electrofusion is used to trigger the diploid reconstructed oocyte to undergo meiosis to produce the blastocyst.
To prevent immune rejection of the developing blastocyst, Surrogate C must be genetically identical to Donor A.
39 exam-style questions on OCR A A Level Biology Cloning and biotechnology. Each one has a worked solution and a mark scheme showing where the marks go.