1. XX XX XY XY Mind Stretcher 3-2-17 Y X X X XX Girl 50% XY Boy
Complete the Punnett square below and write the possible genotypes, phenotypes and probability of the offspring. 1. What is the probability of having a boy or a girl baby? (Mom= XX Dad= XY) X X
Genotype
Phenotype
Probability XX
Girl
50% XY
Boy XX XX X XY XY Y

2. “Solving Problems” Quiz
Clear desk except for a pencil & put up dividers
Show ALL work on quiz
Bubble answers on BACK side of quiz
Turn in…Continue working SILENTLY on Ch. 5-2, Spongebob 1 or 2, etc.
We will move on when everyone is finished with the quiz
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3. Lecture 2 Video- Just listen!

4. Codominance Some alleles are neither dominant or recessive.
Codominance is when alleles are neither dominant or recessive, both alleles are expressed in the offspring.
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5. What will Happen?
You have two flowers, a white and a red, that are crossed.
The flowers are codominant.
What color will their offspring be?
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6. Incomplete Dominance When BOTH alleles have some degree of influence.
*Analogy- It’s like mixing blue and red paint colors…the result would make PURPLE paint.
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7. What will Happen?
You have two flowers, a white and a red, that are crossed.
The flowers display incomplete dominance.
What color will their offspring be?
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8. Video clip: Khan Academy
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9. Add to your notes!! Complete Dominance: Codominant:
- Only 1 allele in the genotype is seen in the phenotype.
Codominant:
- Both alleles in the genotype are seen in the phenotype.
Incomplete Dominance:
- A mixture of the alleles in the genotype are seen in the phenotype.

10. Blood Types: Background Info
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