06BIS101S2013DomRecLect6

Co dominance o rh positive o rh negative a rh

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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 “incomplete.” ­ For the heterozygote, we must For use C+/C- instead of Cc. Cc ­ Instead of a 3:1 phenotypic Instead ratio in the F2, a 1:2:1 ratio 1:2:1 is obtained, indicative of is incomplete dominance. incomplete 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. co-dominance. O Rh-positive O Rh-negative A Rh-positive A Rh-negative B Rh-positive B Rh-negative AB Rh-positive AB Rh-negative 02/12/14 ----------------- 38 percent 7 percent 34 percent 6 percent 9 percent 2 percent 3 percent 1 percent BIS101­001, Spring 2013—Genes and...
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