Homo Sylvanus by Amber D. Sistla
Approx. 10,470 words.
Published on August 23, 2011.
This novelette originally appeared in Jim Baen's Universe. While traveling on a colonization ship, Brennan is desperate to prevent his daughter Tamsyn from inheriting his genetic deficiencies. The consequences of his efforts to illegally modify her DNA affect Brennan, Tamsyn, and the colonists.
Part of the "Break Bites" Series: Stories short enough to read when you get a break.