1. 12/12/14
Discussion Questions
Using textbook pages to help you (read over
them carefully), please complete this dihybrid punnett
square: BbSs x BbSs B=blue b = green
S= shiny s = dull

2. Discussion Questions BbSs x BbSs B=blue b = green S= shiny s = dull
12/12/14
Discussion Questions
BbSs x BbSs B=blue b = green
S= shiny s = dull
Phenotypic ratios
9:3:3:1
9 blue shiny
3 green shiny
3 blue dull
1 green dull

3. Reminders Root quiz 12-17-14 Exam 12-18-14 (chapters 10 & 11)
Pick up your science fair project today please
Go to room 1135 Tues or Thurs for Science Peer Tutoring during PLC

4. Today’s Objective:
Objective: Identify and describe the stages and purpose of Meiosis as related to Genetics and Heredity.
Review Mendel’s discoveries and simple Mendelian Genetics with monohybrid punnett squares and dihybrid punnett squares.
Understand and explain NonMendelian inheritance patterns such as codominance and incomplete dominance and how to complete and use pedigrees in genetic studies

6. Pedigrees ppt 6

7. Pedigrees

8. Pedigrees are used to: Determine whether a trait is inherited
Show how a trait is passed from one generation to the next
To determine if an allele is dominant or recessive

9. Symbols:
Female
Male

10. Connecting Symbols:
Married Couple
Siblings

11. Generations I II
III

12. Symbols:
Affected
Carrier
Deceased

13. Sex-linked: Sex-linked issues…
Are caused by genes located on X or Y chromosome
More common in males since they have only 1 X chromosome; females more often carriers
Female must have 2 recessive genes for trait to occur

14. Karyotypes
To look for nondisjunction (chromosomes fail to separate) or other genetic disorders

15. Karyotypes
To look for nondisjunction (chromosomes fail to separate) or other genetic disorders

16. Accessing Genetic Disorders
Analyzing pedigrees
Genetic counseling
Prenatal testing

17. Pedigree Practice Problems
If time remains

18. Exit Ticket 1. Please describe the purpose of meiosis.
2. What are homologous chromosomes?
3. Please describe Mendel’s research
4. Please compare monohybrid and dihybrid crosses