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Unformatted text preview: ression, R.L. Rodriguez 26 Incomplete Dominance (p.109-110)
In 4-O’clocks, the F1
heterozygote of a cross
between red and white flowers
is pink or intermediate between
the two parental phenotypes.
Dominance is said to be
For the heterozygote, we must
use C+/C- instead of Cc.
Instead of a 3:1 phenotypic
ratio in the F2, a 1:2:1 ratio
is obtained, indicative of
January 31, 2007 C+/CC-/CC+/C+ BIS101001, Spring 2013—Genes and Gene Expression, R.L. Rodriguez ©2013
BIS101001, Spring 2013—Genes and Gene Expression, R.L. Rodriguez 27 Codominance
Codominance A,B andO Blood Group Antigens
The A,B,O blood group system is a classic example of co-dominance.
AB Rh-negative 02/12/14 ----------------- 38 percent
1 percent BIS101001, Spring 2013—Genes and...
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