Complex Inheritance 11. 2. I. VOCAB A. __________ Pattern- The way hereditary traits are passed to offspring 1. _________ Dominance 2. Incomplete Dominance.

Complex InheritanceComplex Inheritance

11. 211. 2

I. VOCABI. VOCABA. A. __________ Pattern__________ Pattern- The - The way hereditary traits are way hereditary traits are passed to offspringpassed to offspring

1. _________ Dominance1. _________ Dominance2. Incomplete Dominance2. Incomplete Dominance3. Codominance3. Codominance4. ____________ Alleles4. ____________ Alleles5. Polygenic5. Polygenic

I. VOCAB (cont)I. VOCAB (cont)B. B. Incomplete DominanceIncomplete Dominance--An intermediate An intermediate (__________) offspring is (__________) offspring is producedproduced

1. Red x White = Pink1. Red x White = Pink

2. Always ____ozygous2. Always ____ozygous

C. C. CodominanceCodominance- _______ - _______ traits are expressedtraits are expressed

1. Think of co-captains on 1. Think of co-captains on the basketball team!the basketball team!

2. Examples: Black & 2. Examples: Black & white chicken, AB Blood white chicken, AB Blood type type

I. VOCAB (cont)I. VOCAB (cont)

D. D. Multiple Alleles-Multiple Alleles- more more than two allelesthan two alleles to choose to choose from for the trait (still uses from for the trait (still uses ______ alleles at one time)______ alleles at one time) BBa (___)a (___) B Bb (___)b (___) B Bc (_____)c (_____)

Dominant Recessive to RecessiveDominant Recessive to Recessive to allto all red, dominantred, dominant to all to all

to brownto brownSee Problem-Solving Lab 12.2 for practiceSee Problem-Solving Lab 12.2 for practice

I. VOCAB (cont)I. VOCAB (cont)

1.1. Blood TypeBlood Type

a. ___ Possible Alleles: a. ___ Possible Alleles:

A (IA (IAA),B(I),B(IBB),O(i)),O(i)

b. Possible Genotypes:b. Possible Genotypes:

Type A=IType A=IAAIIAA or _______ or _______

Type B=IType B=IBBIIBB or _______ or _______

Type O=__ Type AB=IType O=__ Type AB=IAAIIBB

I. VOCAB (cont)I. VOCAB (cont)

E. E. _______ Inheritance_______ Inheritance- Trait - Trait controlled by ___ or more controlled by ___ or more genes genes that blend togetherthat blend together

1. Many human traits are 1. Many human traits are ________________________

2. Height, skin color, eye 2. Height, skin color, eye color, hair color, etc.color, hair color, etc.

I. VOCAB (cont)I. VOCAB (cont)

E. Polygenic (cont)E. Polygenic (cont)

3. Genes may be on the 3. Genes may be on the _____________________ _____________________ chromosomeschromosomes

I. VOCAB (cont)I. VOCAB (cont)

E. Polygenic (cont.)E. Polygenic (cont.)

5. Height is controlled 5. Height is controlled by __ genes (_________)by __ genes (_________)

IF: aabbcc = 4 cmIF: aabbcc = 4 cm

AND: AABBCC = 16 cmAND: AABBCC = 16 cm(2 cm added for each capital letter)(2 cm added for each capital letter)

THEN: AaBbCc = _____ cmTHEN: AaBbCc = _____ cm

I. VOCAB (cont)I. VOCAB (cont)

Just add the genes!

E. Polygenic (cont)E. Polygenic (cont)

6. Hair color example…6. Hair color example…

7. Punnet Squares & 7. Punnet Squares & Graphing (see pg. 320)Graphing (see pg. 320)

I. VOCAB (cont)I. VOCAB (cont)

A. External EnvironmentA. External Environment1. temperature, 1. temperature,

nutrition, light and nutrition, light and chemicals can __________ chemicals can __________ geneticsgenetics

a. Arctic Fox turns a. Arctic Fox turns white in cold and black white in cold and black in warm tempsin warm temps

II. Environmental FactorsII. Environmental Factors

B. Internal EnvironmentB. Internal Environment1. Hormones can also 1. Hormones can also

cause genes to be cause genes to be __________________________________________

a. Male feathers are a. Male feathers are usually brighter usually brighter b. Baldness is b. Baldness is

dominant in ______, but not dominant in ______, but not ____________

II. Environmental FactorsII. Environmental Factors