Crossing over between the
colorless (c) / colored (C) and
starchy (Wx) / waxy (wx) endosperm
traits in maize
can be correlated with cytological markers:
a knob at one end of the chromosome and a translocation at the other end.
For example, the colorless, waxy recombinant chromosome (case I) has lost its knob,
providing visual evidence that physical exchange of genetic material had occurred.
