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Incomplete Dominance•A form of intermediate
inheritance in which heterozygous alleles are both expressed, resulting in a combined phenotype.
An incomplete dominance example, both the instructions for “make red” and the instructions for “make white” are carried out. The result is PINK.
Example•A RED Four-o-Clock flower and a WHITE Four-O-Clock flower are cross pollinated. What are the possible offsprings?
Red Blood Cells• Normal Cells• Disc shaped• Soft and jelly like• Can move easily
through the blood vessels
• Lasts 120 days
• Sickle Cells• Sickle-shaped• Hard• Can not easily move through
blood vessels. Clogs the vessels and can stop blood flow.
• Lasts 60 days, which causes a lack of hemoglobin and oxygen
• Affects mainly people of African, Mediterranean, India, Middle East decent
Blood Cells and Genetics
• Normal Cells: NN– Normal cells, disc shaped
• Sickle Cell Trait: NS– Carries the gene for sickle cell but
does not show signs• Sickle Cell Disease: SS
– Has Sickle Cell Anemia and suffers from complications
Resources• Red Four-O-Clock
http://www.dkimages.com/discover/previews/927/703437.JPG• White Four-O-Clock
http://www.fireflyforest.com/flowers/whites/white75.html• Pink Four-O-Clock
http://davie.tv/DavTV/images/2006/4oClock.JPG• Sickle Cell http://www.thirdage.com/healthgate/Images/si55551158.jpg
http://www.defiers.com/scd.html