1. What is a genotype? What is a phenotype? Monday February 6, 2017 Day 2
1. Please have these
Items on your desk.
Agenda
Science Starters
Sheet
What is a genotype?
What is a phenotype?
Monday February 6, Day 2

2. Table Of Contents 2/6 (Green) Warm Ups 2/6-2/10/17 pg 22
2/6 (Purple) Genetics Notes Part pg 24

3. Generation 3 (You do) R r Red rose = Rr R r R R R Genotype
Phenotype
75% Red 25% White R r r r r
Baker 2003/2004

4. Whose got Genes? Part 2
Genes, Heredity, & DNA
Baker 2003/2004

5. Who was Gregor Mendel?
Austrian monk who studied mathematics and science
As a boy he could predict the possible types of flowers and fruits that would result from crossbreeding two plants in his father’s garden
Picture taken from biography.com
Baker 2003/2004

6. Who was Gregor Mendel?
Curiosity about the connection between the color of a pea flower and the type of seed that same plant produced inspired him to begin experimenting with garden peas in 1856.
Made careful use of scientific methods, which resulted in the first recorded study of how traits pass from one generation to the next.
Baker 2003/2004

7. The passing of traits from parent to offspring
Define HEREDITY
The passing of traits from parent to offspring
Baker 2003/2004

8. Define ALLELE The different forms of a trait that a gene may have
One form of a gene
Baker 2003/2004

9. What is HOMOZYGOUS? Both alleles [forms of the gene] are the same
When offspring inherit two dominant genes, (one dominant gene from each parent) they are said to be homozygous dominant
When offspring inherit two recessive genes, (one recessive gene from each parent) they are said to be homozygous recessive AA aa
Baker 2003/2004

10. What is HETEROZYGOUS? When alleles occur in different formsAa
What is HETEROZYGOUS?
When alleles occur in different forms
When offspring inherit one dominant gene and one recessive gene, they are said to be heterozygous
Since the dominant gene will be expressed, they are said to be heterozygous dominant
Baker 2003/2004

11. Generation 1 B Brown Eyes are Dominant to b Blue Eyes B b Heterozygous
Homozygous recessive b b B b b
Genotype
2 Bb 2bb
Phenotype
50% Brown
50% Blue B b b b b
Baker 2003/2004

12. Generation 2 B Brown Eyes are Dominant to b Blue Eyes B B
Homozygous Dominant
Homozygous Recessive B b B b b
Genotype
4 Bb
Phenotype
100% Brown Eyes b B b B b
Baker 2003/2004

13. Generation 3 B Brown Eyes are Dominant to b Blue Eyes B B
Homozygous Dominant
Heterozygous B B B B B
Genotype
2 BB 2 Bb
Phenotype
100% Brown Eyes B b b B b
Baker 2003/2004

14. References
Slideshow adapted from
Baker 2003/2004