1. DO NOW On p.21 in your journal, solve the following problem:
When the beautiful, winged, purple eyed goddess, Senira, was shot with the arrow of an ugly doctor named Chutt, her parents were mortified. Senira’s parents had always made a big deal that they are both purebred for purple eyes. They would never let her marry a hybrid-eyed dude. Senira and Chutt were in love, but he didn’t know whether his purple eyes were pure or heterozygous, so they decided to elope. Draw a Punnett Square for EACH scenario and write a probability for their offspring.

3. Practice
A person has the genotype Ff where F represents the dominant trait no freckles while f represents the recessive trait freckles. What is the phenotype of this person?
Genotype of homozygous dominant? Phenotype?
Genotype of homozygous recessive? Phenotype?
Genotype of purebred for freckles? Phenotype?
Genotype of hybrid? Phenotype?

4. Mendel day 2

5. Punnett squares: Axes
Represent genotypes of each parent

6. Grid Boxes
Show all possible genotypes of offspring inside the grid box

7. Monohybrid Cross R R r Rr Rr r Rr Rr
Examines the inheritance of one specific trait R R r Rr Rr r Rr Rr

8. ratio R R r Rr r Rr Rr 0:4:0 for RR : Rr : rr 4
Genotype- Homo Dom : Hetero: Homo recessive
How many do you have of each genotype…
How many homozygous Dominant do we have?
How many heterozygous do we have?
How may homozygous recessive do we have?
0:4:0 for RR : Rr : rr 4 R R r Rr r Rr Rr

9. Phenotype ratio 4 Dom : Rec
If big R is dominant for red and little r is recessive for white…
How many red offspring are there?
How many white offspring are there?
Ratio?
4: Red: White 4

10. Dihybrid Cross Examines the inheritance of two traits at the same time
16 grid boxes
Skipp with standard! Or find beeter way to explain
- Do more practice with monohybrid cross

11. F.O.I.L

12. To find the four options for the top and sides, we need to use the foil method (First Outer Inner Last) to find the four alleles for each parent
Our two traits will be color and size
R is still dominant for Red and r is still recessive for white
T is now dominant for tall and t is recessive for short
Parent 1: RRTT
Parent 2: Rrtt
Add section to notes to practice F.O.I.L

13. F.O.I.L Parent 2: Rrtt RT RT RT RT Rt Rt rt rt Rt RT RT Rt RT rt RT rt
F irst
O uter
I nner
L ast
RT RT RT RT
Parent 2: Rrtt F O I L
Rt Rt rt rt Rt RT RT Rt RT rt RT rt

14. RT RT RT RT Rt rt Rt rt RRTt RRTt RRTt RRTt RrTt RrTt RrTt RrTt RRTt
ADDDDD to notes!!!!!! rt
RrTt
RrTt
RrTt
RrTt

15. Ratios: gento Genotype How many RRTt? How many RrTt? 8 : 8 RRTt : RrTt
Dom: rec
How many RRTt?
How many RrTt?
8 : 8 RRTt : RrTt

16. Ratios: phenotype 16 How many white and small?
How many white and tall?
How many red and small?
How many red and tall?
Pheno: most Dom most rec 16

17. Law of Independent Assortment
Inheritance of one trait does not influence the inheritance of a second trait
Traits are inherited independently

18. Lets practice
Use the manipulatives to F.O.I.L. and complete the dihybrid cross on the table. You are working in pairs.
When finished and checked by Ms Beck, Start working on the practice example on the BACK of your notes!

19. Lets Practice

20. Dihybrid cross Classwork
C – using level 2 voices
H- ask three before me (raise your hand to get my attention)
A- complete even # Mendel genetics review WS on table with markers provided (odd on own)
M- remain seated (butt on the stool)
P- work with your table partner
SUCCESS
Add how to determine parent genotypes from given offspring

21. Exit ticket
why or why not it is correct: in a dihybrid cross of HhGg X HhGg, where H is dominant for Hair and h is recessive for bald and G is dominant for green skin and g is recessive for yellow skin, there is a 9:4:2:1 ratio for the different genotypes