6.
na Pm Rg
x na pm rg
Na pm rg
pm = pale midrib
Numbers
na Pm Rg
=
125
314
Na pm rg
=
189
Na Pm Rg
=
109
166
na pm rg
=
57
Na pm Rg
=
13
34
na Pm rg
=
21
na pm Rg
=
1
6
Na Pm rg
=
5
Total 520
Rg - na = 40.8% c.o.
Rg - pm = 7.7% "
pm - na = 33.1% "