In the process of creating a knockout mouse, if a recombination event occurs at a random site in the mouse chromosome through nonhomologous recombination, the $$ mouse cells gene at the end of the construct would be inserted into the chromosome making the

$$ to ganciclovir.

Select an answer and submit. For keyboard navigation, use the up$/$down arrow keys to select an answer.

a $tk+,$ resistant

b Neo, resistant

c $tk+,$ sensitive

d Neo, sensitive