1. Textbook: Biology11 Chapter 4
Genetics
Textbook: Biology11 Chapter 4

2. Heredity

3. Gregor Mendel Austrian monk (1822-1884) Worked with pea plant
Readily distinguishable characteristics
Short generation time
Easy to control pollination

5. Reproductive structures of flowers
                                                                  
transfer pollen from pollen
parent to seed parent

8. Monohybrid Cross (p.3 and 132-137) Tall x Small (homozygous)

10. The 3 Mendel’s laws (p.2)
Mendel's first law (also called the law of segregation) states that during the formation of gametes (reproductive cells), pairs of allele for a specific trait separate so that offspring receive one factor from each parent.

11. Mendel’s second law (p.6)
Mendel's second law (also called the law of independent assortment) states that the distribution of alleles for one trait that occurs during the formation of gametes (meiosis) does not affect the distribution of alleles for other traits.

12. Mendel’s third law
Mendel's third law (also called the law of dominance) states that one of the genes for a pair of inherited traits will be dominant and the other recessive, unless both factors are recessive.

13. Practice makes perfect
Bio 11 p. 137 #1
And genetics worksheet 1

14. Test Cross: To determine the genotype of a dominant phenotype (p.4)

15. Practice makes perfect
Do genetics worksheet 2
And p # 2 & 4
And p. 140 #5

16. Dihybrid Cross
And now, the fun part, the F2 generation

17. Dihybrid cross (answers for p.5 of booklet)

18. Practice makes perfect
Do genetics worksheet 3
Lab: Genetics of Corn
Lab: Virtual Fruit Fly

19. Multiple alleles (p.6) More than 2 alleles
Ex: eye colour of fruit flies
wild type(red) > apricot > honey > white
Phenotype genotype
wild type ___
apricot ___
honey ___
white ___

20. Multiple alleles (p.6)
Exercice E1E4 x E2E3 (red x apricot)

21. Incomplete dominance (p.7, 144-145)
Ex: Colour of snapdragons’ flowers
Red x White
CRCR x CWCW (do Punnett square) Ratio F2?

22. Co-dominance (p.9) Another form of incomplete dominance.
Ex: red, white, roan cow, ABO blood groups
Alleles: IA, IA, i
Group A: antigen ___ : ____ or ____
Group B: antigen ___ : ____ or ____
Group AB: antigen ___ : ____
Group O: antigen ___ : ____

23. Co-dominance: try this
Mother is A
Baby is AB
Man is O
Man is B
Who is the father? Show your answer by drawing the 2 possible Punnett Squares.

25. Practice makes perfect
Do Genetics worksheet 4
Bio 11 p. 145 # 1 & 4.

26. Lethal genes (p. 9)
Read and do Polygenic Inheritance

27. Polygenic Inheritance (p.9)
Characteristic controlled by several pairs of genes which are independent of each other, often on different chromosomes eg. Eye color, skin color, height
Shows continuous variation

28. Polygenic inheritanceAB Ab aB ab
AABB
AABb
AaBB
AaBb
AAbb
Aabb
aaBB
aaBb
aabb

29. Polygenic inheritance
Let’s do bottom of p. 9 together

30. Polygenic Inheritance with complimentary interaction (p.10)
Pea comb = rrP_
Rose comb = R_pp
Walnut comb = R_P_
Single comb = rrpp
Let’s do p. 10 together

31. More practice
Genetics worksheet 5

32. Linkage