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Cloning

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Question 27

The diagram shows the stages in the somatic cell nuclear transfer (SCNT) cloning process used to produce a clone of a prize-winning dairy cow.

A scientific flow diagram showing the 8 numbered steps of somatic cell nuclear transfer (SCNT) cloning in cattle.

a.

Complete the table by identifying the stage number at which each event takes place.

  • Event 1: Repeated mitotic cell divisions produce an early embryo (blastocyst)
  • Event 2: The developing embryo is transferred into the uterus of a surrogate cow
  • Event 3: An unfertilised egg cell is harvested from a donor cow
[3]
b.

Which animal in the diagram is the clone?

  • A: Cow P
  • B: Cow J
  • C: Cow H
  • D: Calf C
[1]
c.

Which cattle are genetically identical (excluding mitochondrial DNA)?

  • A: Cow P and Calf C
  • B: Cow P, Cow J, Cow H, and Calf C
  • C: Cow P and Cow J
  • D: Cow J and Calf C
[1]

Cloning Questions

  1. IGCSE
  2. /Biology
  3. /Cloning