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

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Presentation transcript:

Complex Inheritance 11. 2

I. VOCAB A. __________ Pattern- The way hereditary traits are passed to offspring 1. _________ Dominance 2. Incomplete Dominance 3. Codominance 4. ____________ Alleles 5. Polygenic

I. VOCAB (cont) B. Incomplete Dominance- An intermediate (__________) offspring is produced 1. Red x White = Pink 2. Always ____ozygous

C. Codominance- _______ traits are expressed 1. Think of co-captains on the basketball team! 2. Examples: Black & white chicken, AB Blood type I. VOCAB (cont)

D. Multiple Alleles- more than two alleles to choose from for the trait (still uses ______ alleles at one time) B a (___) B b (___) B c (_____) B a (___) B b (___) B c (_____) Dominant Recessive to Recessive to allred, dominant to all to allred, dominant to all to brown to brown See Problem-Solving Lab 12.2 for practice I. VOCAB (cont)

1.Blood Type a. ___ Possible Alleles: A (I A ),B(I B ),O(i) b. Possible Genotypes: Type A=I A I A or _______ Type B=I B I B or _______ Type O=__ Type AB=I A I B I. VOCAB (cont)

E. _______ Inheritance- Trait controlled by ___ or more genes that blend together 1. Many human traits are ____________ 2. Height, skin color, eye color, hair color, etc. I. VOCAB (cont)

E. Polygenic (cont) 3. Genes may be on the _____________________ chromosomes I. VOCAB (cont)

E. Polygenic (cont.) 5. Height is controlled by __ genes (_________) IF: aabbcc = 4 cm AND: AABBCC = 16 cm (2 cm added for each capital letter) THEN: AaBbCc = _____ cm I. VOCAB (cont) Just add the genes!

E. Polygenic (cont) 6. Hair color example… 7. Punnet Squares & Graphing (see pg. 320) I. VOCAB (cont)

A. External Environment 1. temperature, nutrition, light and chemicals can __________ genetics a. Arctic Fox turns white in cold and black in warm temps II. Environmental Factors

B. Internal Environment 1. Hormones can also cause genes to be _____________________ a. Male feathers are usually brighter b. Baldness is dominant in ______, but not ______ II. Environmental Factors