Question

below is data for 250 offspring mice, as produced in a laboratory.
black fur and black eyes\tblack fur and red eyes\twhite fur and black eyes\twhite fur and red eyes
predicted fraction\t9/16\t3/16\t3/16\t1/16
predicted percentage\t56.25%\t18.75%\t18.75%\t6.25%
laboratory fraction\t155/250\t51/250\t44/250\t20/250
laboratory percentage*\t62%\t20.4%\t17.6%\t8.0%
notice that the predicted percentages and laboratory percentages are not the same. these differences most likely result from
done

Explanation:

In genetics experiments (related to Biology, a subfield of Natural Science), when comparing predicted (theoretical) and observed (laboratory) phenotypic ratios in offspring, differences often arise from random chance during the fertilization process or sampling error. The predicted ratios are based on Mendelian genetics (expected probabilities), but in real - world small - scale experiments (here, 250 offspring), the actual results can deviate from predictions due to the random nature of which gametes fuse and form zygotes. This randomness leads to the observed percentages not matching the predicted ones exactly.

Answer:

random chance (or sampling error)