1. Episode 1: Traits, Genes, and Alleles
Series: Genetics
Season 2: Of Germs and Genes
Episode 1: Traits, Genes, and Alleles
Objective: Infer an individual’s genotype based on their phenotype
Bell Ringer: Get the article from the front. Read and annotate the article using your annotation key from your notebook. Write a 1 paragraph summary and reaction using your annotations as a guide

2. I. Genes encode proteins that produce a diverse range of traits.

3. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.

4. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.
a. Each parent donates one allele for every gene.

5. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.
a. Each parent donates one allele for every gene.
b. Homozygous: two same alleles

6. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.
a. Each parent donates one allele for every gene.
b. Homozygous: two same alleles
c. Heterozygous: two different alleles

7. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.
a. Each parent donates one allele for every gene.
b. Homozygous: two same alleles
c. Heterozygous: two different alleles

8. 1. An allele is any alternative form of a gene occurring at a specific location on a chromosome.
a. Each parent donates one allele for every gene.
b. Homozygous: two same alleles
c. Heterozygous: two different alleles

9. A. Genes influence the development of traits.

10. A. Genes influence the development of traits.
A genotype refers to the genetic makeup

11. Aa A. Genes influence the development of traits.
A genotype refers to the genetic makeup
Genotype: Aa

12. Aa A. Genes influence the development of traits.
A genotype refers to the genetic makeup
A phenotype is the physical expression of a trait
Genotype: Aa

13. Aa A. Genes influence the development of traits.
A genotype refers to the genetic makeup
A phenotype is the physical expression of a trait
Genotype:
Phenotype: Aa

14. 3. Alleles can be represented using letters

15. 3. Alleles can be represented using letters
Dominant:

16. 3. Alleles can be represented using letters
Dominant:
CAPITAL LETTERS

17. 3. Alleles can be represented using letters
Dominant:
CAPITAL LETTERS
Expressed when at least one allele is dominant: RR, or Rr

18. 3. Alleles can be represented using letters
Dominant:
CAPITAL LETTERS
Expressed when at least one allele is dominant: RR, or Rr

19. b. Recessive:

20. b. Recessive:
lowercase letters

21. b. Recessive:
lowercase letters
Expressed only when two copies are present: rr

22. b. Recessive:
lowercase letters
Expressed only when two copies are present: rr

23. HUMAN GENETICS ACTIVITY
COMPLETE THE HUMAN GENETICS ACTIVITY IN YOUR LAB NOTEBOOK
RETURN THE INSTRUCTION SHEET BY THE END OF CLASS