Tonegawa Comprehension Questions

$B Question 6: Paragraph 3

$BBh;0CJMn$G$O!"@)8B9ZAG$*$h$S(BDNA$BAH$_49$(

$B$;$$$2$s$3$&$=!!$*$h$S!!(BDNA$B$/$_$+$($7$e$[$&$,!!$+$$$O$D$5$l!"$J$s$N(B $B$1$s$-$e$&$,!!$+$N$&$K!!$J$C$?$H!!$$$C$F$$$^$9$+!#(B

What was the research stated in the paragraph 3, that could be carried out by the development of restriction enzymes and DNA recombination methods?

3. B$B%j%s%Q5e$N8&5f(B
    B$B%j%s%Q$-$e$&$N!!$1$s$-$e$&(B
    Research of B lymphocytes

Wrong.

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