1. Genetics Bellwork

2. BELLWORK #1: 1/7
Mildred wants to know the effects of using different types of liquids (water, vinegar, Coke, and Orange Juice) on the growth of her plants.
A) What is the independent variable?
B) What is the dependent variable?

3. Bellringer 1/4 BINDER CHECK Take your binders out
SOME Semester One materials need to be kept! You will have a comprehensive EOC exam at the end of semester 2.
You NEED to keep the following
NOTES packet and VOCAB from EACH UNIT
You Can also keep REVIEW PACKETS
Make sure you have blank paper
If you do not, bring some on Monday

4. BELLWORK : 1/8
Which of these best explains the difference between the way animals and plants exchange gases with their environments?
A. Animals use only photosynthesis, while plants use both photosynthesis and respiration.
B. Animals use only respiration, while plants use both photosynthesis and respiration.
C. Animals use both photosynthesis and respiration, while plants use only respiration.
D. Animals use both photosynthesis and respiration, while plants use only photosynthesis.

5. Bellwork: 1/9
1. Dominant traits are represented by a _________ letter.
2. Recessive traits are represented by a __________ letter.
In dogs, brown fur is DOMINANT to golden fur. So, B= b=
If a dog has the genotype BB, what color is it’s fur?
a. Bb?
b. bb?

6. Homozygous Dominant—Heterozygous—Homozygous Recessive
Bellwork: 1/10
Tail rot is a recessive disorder that occurs in otters.
Which letter represents Tail Rot and which letter represents a healthy tail? R= r=
Classify the following genotypes as either:
Homozygous Dominant—Heterozygous—Homozygous Recessive
rr= RR= Rr=

7. Bellwork: 1/11
Cystic Fibrosis is caused by a recessive mutation. It causes the affected person to have thick mucous in their lungs and be prone to frequent lung infections. Amy and Austin are both carriers for CF.
1. Does Amy or Austin have the CF disease?
2. What is their genotype?
3. Would Amy be classified as Homozygous Dominant, Homozygous Recessive, or Heterozygous?

8. Bellwork: 1/14
Cystic Fibrosis is caused by a recessive mutation. It causes the affected person to have thick mucous in their lungs and be prone to frequent lung infections. If Amy and Austin are both carriers for CF, what are the chances that they’ll have a child who is healthy?
Gene Notation:
_____:__________
Genotypes:
Amy:__________
Austin:_________
What are the chances that Amy and Austin will have a healthy child? __________

9. Bellwork: 1/15
Cystic Fibrosis is caused by a recessive mutation. If Amy is a carrier for CF and Austin has CF, what are the chances that they’ll have a child who is healthy?
Gene Notation:
_____:__________
Genotypes:
Amy:_________
Austin:________
What are the chances that Amy and Austin will have a healthy child? __________

10. Bellwork: 1/16 Female: aaPp not annoying, has stinky pee
Male: Aapp Annoying, no stinky pee
1. What are the possible egg combinations for the female?
______________________________________________
What are all of the possible sperm combinations for the male?

11. Bellwork: 1/17 Female: aaPp not annoying, has stinky pee
Male: Aapp Annoying, no stinky pee
What are all the possible genotypes and phenotypes of their children?

12. Bellwork: 1/18 Female: Llmm Long fingers, no monkey toes
Male: LlMm Long fingers, monkey toes
What are the odds that this couple will have a child with short fingers and no monkey toes?

13. Bellwork : 1/23 Male: RrGg—round & green seeds
Female: RrGg—round & green seeds
Complete a Punnett Square
What is the phenotypic ratio of the offspring?

14. Bellwork : 1/24 Incomplete Dominance:
Red & white are the two homozygous traits, pink is the heterozygous.
Cross a pink and a white flower, and give the phenotypic ratio of the offspring.

15. Bellwork : 1/25 Co-Dominance:
Black & white are the two homozygous traits, black & white stripes is heterozygous.
Cross two striped individuals, and give the phenotypic ratio of the offspring.

16. Bellwork 1/28
a. What is the difference between incomplete dominance and codominance?
b. If blue and yellow are the two homozygous traits
for flower color, what will be the genotype of the
blue flower if flower color is incompletely dominant?
c. What would the genotype of the yellow flower be?
What will be the genotype of the blue flower if flower color is codominant?
e. What would be the genotype of the yellow flower?

17. Bellwork 1/29 Sex-Linked:
Hemophilia is a sex-linked, recessive trait. A man has hemophilia marries a woman who is a carrier.
Cross these individuals, and determine what percent of their children will have hemophilia.