RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive....
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Transcript of RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive....
![Page 1: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/1.jpg)
ARE THERE EXCEPTIONS TO MENDEL’S IDEAS OF
DOMINANT AND RECESSIVE?
![Page 2: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/2.jpg)
YES!!
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WHAT DO YOU THINK WOULD HAPPEN? HOW
ABOUT MENDEL?
![Page 4: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/4.jpg)
ACCORDING TO MENDEL, WE SHOULD
SEE 100% RED HETEROZYGOUS
OFFSPRING..
![Page 5: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/5.jpg)
WE SEE THIS INSTEAD.
RR WW
RW
![Page 6: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/6.jpg)
COMPLEX PATTERNS OF
INHERITANCECHAPTER 7
(GET EXCITED!!)
![Page 7: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/7.jpg)
INCOMPLETE DOMINANCE
• With incomplete dominance, neither allele is completely dominant nor completely recessive.
--> Heterozygous phenotype is an ______________ between the two homozygous phenotypes
=+
intermediate
![Page 8: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/8.jpg)
INCOMPLETE DOMINANCE
![Page 9: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/9.jpg)
CODOMINANCE
• With codominance, both alleles are dominant and equally expressed.
--> both alleles express themselves in a heterozygous organism
• for example, and sickle cell anemiaroan cows
+ =
fully
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CODOMINANCE
+
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Sickle cell
Normal red blood cell
SICKLE CELL ANEMIA
![Page 12: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/12.jpg)
![Page 13: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/13.jpg)
• Changes in hemoglobin cause red blood cells to change to a sickle shape.
• People who are heterozygous for the trait have both normal and sickle-shaped cells.
![Page 14: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/14.jpg)
![Page 15: RR WW RW With incomplete dominance, neither allele is completely dominant nor completely recessive. --> Heterozygous phenotype is an ______________.](https://reader034.fdocuments.net/reader034/viewer/2022051620/56649efa5503460f94c0b7d4/html5/thumbnails/15.jpg)
• Sickle red blood cells clump together and stick to the walls of blood vessels, blocking blood flow.
• This can cause severe pain and permanent damage:brain, heart, lungs, kidneys, liver, bones, and spleen.
SYMPTOMS
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POLYGENIC TRAITS
• Traits that are influenced by ____________________
• for example, skin color, height, eye color, and fingerprint pattern
multiple gene pairs
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MULTIPLE ALLELES
• form of inheritance that is determined by _________ __________• for example, human blood types
-Type A
-Type B
-Type AB
-Type O
more than 2 alleles
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BLOOD TYPES
• Antigens are ___________ foreign to the _____.• Rh factors can either be ___________ or _____________
+-
substances
body
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