1. FERTILIZATION & Intro to Mendelian Genetics

2. FERTILIZATION

3. In vitro Fertilization

4. EMBRYO DEVELOPMENT

5. TWINS

6. Mendel and His Peas

7. Results Short x Short Tall x Tall Tall x Short Conclusion?
F1 offspring #3 X F1 offspring # 3
Tall Tall
Conclusion?

8. Conclusions
Every characteristic or trait (e.g. height) is determined by two factors (alleles).
There are variations in alleles (e.g. height= tall (T) or short (t))
Genotype: What combination of alleles an individual has (TT, Tt, tt)
Homozygous: individual has two of the same alleles (TT, tt)
Heterozygous: individuals have two different alleles (Tt)

9. Phenotype: What the individual physically looks like (determined by genotype)
Dominant allele: The allele that shows up physically in the heterozygous form
Recessive allele: The allele that is not displayed physically in the heterozygous form

10. Is Dominant the most common allele in the population?

11. Genotype
Phenotype
Homozygous Tall TT
Tall
Heterozygous Tall Tt
Homozygous Short tt
Short

12. Mendel’s Law of Segregation
Each allele separates into different gametes during meiosis therefore only one allele is passed down to the offspring T
DNA replication
meiosis T T t T T t t t t

13. Explaining Mendel’s Observations