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Incomplete
or
Co-Dominant?!?!
Normally traits have one dominant
allele and one recessive allele….
What happens when an allele for
a trait isn’t completely dominant
over the other allele?
If red isn’t dominant over white and
white isn’t dominant over red – what
will the offspring look like??
This is called Incomplete Dominance
Key:
RR = Red
WW= White
RW= Pink
If a red flower crosses with a white flower show the
possible offspring below:
R
W
W
R
RW
RW
RW
RW
Normally traits have one
dominant and one recessive
allele….
What happens when both alleles of
the trait contribute to the
phenotype of the organism?
If red is dominant but white is also
dominant– what will the offspring look
like??
This is called Codominant
+
Key:
RR = Red
WW= White
RW= red with
white spots
If a red flower crosses with a white flower show the
possible offspring below:
R
W
W
R
RW
RW
RW
RW
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