Drag each tile to the correct box. What is the correct sequence of events in the history of molecular cloning?
Ian Wilmut and Keith Campbell transferred
nuclei from laboratory-cultured cells into
sheep egg cells without a nucleus, which
led to the birth of two lambs.
Hans Spemann showed that the transfer
of a cell’s nucleus to another cell without
a nucleus results in the formation of a
whole new organism.
Steen Willadsen created a genetically
modified egg by transferring the nucleus
from an early embryonic lamb cell into it,
which eventually developed into a
lamb embryo.
Hans Spemann found that one could
split an early two-celled embryo to form
two separate and complete organisms.
Robert Briggs and Thomas King found
that a frog egg receiving the nucleus from
an early tadpole embryo developed into a
tadpole.

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