topic : genetics aim : describe multiple alleles and explain the inheritance of blood types
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Topic : Genetics Aim : Describe multiple alleles and explain the inheritance of blood types. Do Now : Review HW : Ditto – Reproductive Systems Review (BOTH SIDES!!!). What is structure A? How was it produced? 2. Which structures represent cleavage? 3. What is structure E? - PowerPoint PPT PresentationTRANSCRIPT
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Topic: GeneticsAim: Describe multiple alleles and explain
the inheritance of blood types.
Do Now: Review
HW: Ditto – Reproductive Systems Review (BOTH SIDES!!!)
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1.What is structure A? How was it produced?
2. Which structures represent cleavage?
3. What is structure E?
4. What is structure F?
5. What process occurs after structure F is formed?
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One dog carries the heterozygous black fur trait and the other carries homozygous recessive white traits. What are the chances of having a puppy with black fur?
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B = Black furb = White fur Bb x bb
Chance of having a puppy with black fur:
50%
B b
b
b
B
B
b
b
b b
b b
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Yellow is dominant in flowers & white is recessive. A white flower and a heterozygous yellow flower are crossed. Determine the percentage of white offspring.
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Multiple Alleles
•More than 2 alleles for a trait
•Skin color, blood type, height…
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BloodTypes
•A, B, AB, O•A & B genes = dominant•O = recessive
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•AA (pure)•AO (hybrid)
Blood Type Agenotype
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•BB (pure)•BO (hybrid)
Blood Type Bgenotype
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•ABBlood Type ABgenotype
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•OOBlood Type Ogenotype
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Example #1: Cross a person with blood type AB with someone who has blood type O.
AB X OO
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•AB x OO
A B
O
O
A
A
B
B
O O
O O
50% blood type A50% blood type B
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Example #2: Cross a person who is hybrid for type B with someone who has blood type O.
BO
X OO
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•BO x OOB O
O
O
B
B
O
O
O O
O O
50% blood type B
50% blood type O
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Example #3: Cross a person who is hybrid for blood type A with someone who is hybrid for blood type B
AO
X BO
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•AO x BO
A O
B
O
A
A
B
O
B O
O O
25% blood type AB25% blood type A25% blood type B25% blood type O
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Example #4: Cross a person who has blood type AB with someone who is hybrid for blood type B.
AB X BO
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•AB x BO
A B
B
O
A
A
B
B
B B
O O
25% blood type AB25% blood type A50% blood type B
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So in order to conceive a child with type O, what must both parents be carrying?