Which is the best choice for a genetic transformation: a bacterium, earthworm, fish, or mouse?

A bacterium would be the best choice in this case

Explanation:

Bacteria are small, single-celled organisms which reproduce quickly and easily; it is made of only one cell, it reproduces every 20 minutes, it does not make people sick, it cannot survive outside the lab, etc.

[content deleted] - user123802726recklesschicken

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )