1. Concept Teaching Workshop SBI11U Stephanie Romanello
Mendelian Genetics
Concept Teaching Workshop
SBI11U
Stephanie Romanello

2. Curriculum Expectations
D2: Investigate genetic processes, including those that occur during meiosis, and analyse data to solve basic genetics problems involving monohybrid and dihybrid crosses D3: Demonstrate an understanding of concepts, processes, and technologies related to the transmission of hereditary characteristics
These are the overall expectations. Should I be looking over which specific ones I covered and include those too? Also, the first overall expectation (D1) is missing because it is the STSE expectation which addresses students looking into ethical/social implication of modern genetic technologies. My presentation didn’t cover this so I didn’t include this. Is this okay, or should I be adding this STSE aspect into the presentation?

3. Gregor Mendel Mid 19th century Austrian monk Mathematician Gardner
Failed at being a science teacher
Lots of cool facts, and the delivery is very modern and casual
Difference between modern science videos and old ones– Bill Nye

4. Why Peas?
Have seven traits that are determined by the expression of a single gene

5. Why Peas? Flower structure
Snapdragon trait because it normally self fertilizes
Go over how Mendel cross pollinated these plants
Flower structure

6. Mendel’s Experiments
Previously thought that breeding two different traits would result in a blend
Noticed that only one of the two contrasting traits were expressed

7. Mendel’s Conclusions Each parent contributes one allele to offspring
A dominant allele is always expressed, even if the recessive one is present
Pairs of alleles segregate during sex cell formation
Lead into the next slide with conclusion 1

8. Meiosis
Meiosis described in 1876 by observing sea urchins
Mendel’s pea experiments were done between 1856 and 1863, so he actually got this idea of having to go from diploid to haploid (2n to n)
Video
Very detailed but I like the beginning
You can easily see what is going on by dragging the slider

9. Aa Genes Allele Dominant Allele Recessive Allele
Two or more alternate forms of a gene
Located at the same position on homologous chromosomes
Dominant Allele
An allele whose expression is overpowered by the presence of the recessive allele
Recessive Allele
An allele whose expression is overpowered by the presence of a dominant allele
Determined the phenotype only is the dominant allele is absent Aa

10. AA aa Aa Important Terms AA Aa aa Genotype Phenotype Homozygous
The alleles an organism contains.
Phenotype
Round, Wrinkled
Yellow, Green
Axial, Terminal
The observable traits of an organism that arise because of the interaction between genes and the environment,
Homozygous
AA aa
A genotype in which both alleles of a pair are the same.
Heterozygous Aa
A genotype in which the alleles of a pair are different.

11. Mendel’s Laws Law of Segregation Law of Independent Assortment
Allele pairs segregate during the formation of gametes (sex cells) and randomly unite upon fertilization
Law of Independent Assortment
Going over #2 later in the presentation because it related to multiple alleles
Law 1 deals with the fact that they separate during meiosis and come back together during fertilization

12. Mendel’s Laws Law of Segregation Law of Independent Assortment
Allele pairs separate independently during the formation of gametes.
Implies that traits are transmitted to offspring independently from one another

14. Creating a Personal Profile

15. Genetics Survey

16. Genetics Problems
Non interactive, but still a guided problem set that can be good extra work for students having difficulties/on an IEP…
Interactive, online problem set that allows students to check their work as they go

17. Monohybrid Crosses
1) In pea plants, smooth peas (S) are dominant to wrinkled peas (s). What are the genotypic and phenotypic ratios in a cross of two plants that are both heterozygous for the seed shape trait?

18. Dihybrid Crosses
2) In pea plants, S is the allele for the dominant, smooth shape and s is the allele for the recessive, wrinkled shape. Also, Y is the allele for the dominant, yellow pea and y is the allele for the recessive, green pea. What is the resulting phenotypic ratio of a cross between two individuals that are heterozygous for both traits?

19. Test Crosses
The cross of an organism with a dominant phenotype (genotype could be AA or Aa) with an organism that is homozygous recessive for that trait (aa).
 3) In humans, brown eye colour (B) is dominant over blue eye colour (b). A man has brown eyes and his wife’s eyes are blue. They have a child with blue eyes. What is the father’s genotype?
 4) When considering peas, tall plants (T) are dominant over short ones (t). Two tall pea plants are crossed, producing 105 tall plants & 32 short plants.  What are the genotypes of both parents.

20. Why Peas? Have large amounts of individuals in their progeny.
Compare the amount of individuals a pea plant and a human family produce in one generation– the pea plants give us nice workable numbers that can help us infer ratios
Have large amounts of individuals in their progeny.

21. Incomplete Dominance

22. Codominance– Blood Type Alleles
5) In humans the blood groups are produced by various combinations of three alleles IA, IB, and IO. Blood type A is caused by either IA IA or IA IO; type B by IB IB or IBIO; type AB by IA IB; and type O by IOIO. Suppose a child is of blood type A and the mother is of type 0. What type or types may the father belong to?