The recessive trait in the F1 plants appears in a ratio of 3:1.
The smallest dna fragments are located near the bottom of the gel. (Positive electrode)
The largest dna fragments are located near the top of the gel. (Negative electrode, where they began)
Well considering the lack of information given, most logically we can conclude it’s the peripheral nervous system.
Box 2.
There are only 2 animals with less than 5 legs and both have tails. Box 2 is for animals with less than 5 legs and no tail.
If both animals have tails, Box 2 has no data to input into this classification system.
Hope this helps!