okay – not really. other patterns of heredity polygenic traits = several genes influence the...
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Okay – Not really
Okay – Not really
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Other Patterns of Heredity
Polygenic traits = several genes influence the trait. Examples: Eye color, weight, height, hair color,
& skin color.
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Incomplete dominance = a trait that is in
between the two parent traits. Ex: Red snapdragon flower crossed with white
snapdragon flower results in
PINK snapdragon flowers.
Incomplete dominance
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Co-dominance = Two dominant alleles are
expressed at the same time.
EX: Homozygous red horse crossed with a homozygous white horse results in
Red AND white horse
Co-dominance
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Genes with 3 or more alleles are said to have
multiple alleles.
EX: Blood type in humans (ABO)
Multiple Alleles
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Blood types
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Sickle cell anemia
Recessive genetic disorder. Red blood cells are sickle shaped. Don’t move well through vessels.
Some traits are caused by mutations
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Possible GenotypesRR = normal red blood cellRr = slightly curved red blood cellrr = sickle-shaped red blood cell
In tropical areas of the world, being heterozygous for sickle cell anemia is not so bad.It provides some immunity to the organism Responsible for malaria.
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Recessive genetic disorder. Blood cannot clot well. Sex-linked trait. Mostly affects males.
Hemophilia
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What gender has a greater chance of getting hemophilia?
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What are the 4 main blood types?
Warm Up
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Day 4 NotesDay 4 Notes
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Blood Type = Multiple Alleles & Codominance
Blood type in humans is controlled by 3 alleles A, B, and O A & B are
codominant O is recessive
Phenotype Genotype
A AA or AO
B BB or BO
AB AB only
O OO only
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A-type can only receive A or O blood
B-type can only receive B or O blood
AB-type can receive A, B, O, AB blood Universal Receiver
O-type can only receive O blood Universal Donor
Blood type continued…
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Could you please help me? I have a question
that is NOT a homework question. I am a Junior in High School. "Could a man with type B blood and a woman with type AB produce a child with type O blood?" I think not, because type O is recessive, and the B's seem to be dominant. My cousin thinks yes. Thank you for your help.
Problem 1: Is a type O possible in this situation?
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IMPOSSIBLE
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I have been reading your info about
inheritance of blood types and I am getting very confused! I am trying to figure out what blood type the father of my son could have since my son and I are both type A. Could you please help?
Problem 2: What are the potential blood types of the father of my son?
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The father could be: A. A, AB, B, or O B. Either A or B C. Either A or O
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http://nobelprize.org/educational_games/
medicine/landsteiner/