Posted in P1 SBI3U Biology

SBI3U Genetics Review Questions

Mendel has a pea plant with purple flowers. He doesn’t know if it’s a carrier or true breeder. He wants to use it for a P generation. Show a the test cross he should do to determine this and help him make his decision.

A purple fozzle that is heterozygous for racers (RrBB’) crosses with a purple fozzle that is also heterozygous for racers (RrBB’). Show the Punnett square and phenotypic ratio in whole numbers for this cross.

A man who is O+ and a woman who is B- have a child. Show all the possible crosses for this couple. Show the Punnett Square, GR & PR for a cross that would produce a child that is O-.

Some solutions and some stuff on meiosis and conception.

Posted in P3 SBI3C Biology

SBI3C Fetal Pig Dissection Tutorials



Watch the tutorials below to prepare for the dissection and culminating activity that will go with it. This activity will be a series of slides showing dissected fetal pigs and you will have to apply your knowledge and experience to identify the structures arrows are pointing to based on their name or function.

External anatomy WILL be covered and you can study the terms for this part by studying the terms in the Procedure section on page 510, Figure 1 on p. 510 and Figure 2 on p. 511 of your textbook. Also read pages 510-513 to prepare for the dissection. I will be verbally instructing the dissections but the instructions will closely follow those in these pages. I’ve made some modifications to this section though.



Posted in P1 SBI3U Biology

SBI3U Fetal Pig Dissection Tutorials & Practice Quizzes

Watch the tutorials below to prepare for the dissection and culminating activity that will go with it. This activity will be a series of slides showing dissected fetal pigs and you will have to apply your knowledge and experience to identify the structures arrows are pointing to based on their name or function.

External anatomy WILL be covered and you can study the terms for this part by studying the terms in the Procedure section on page 510, Figure 1 on p. 510 and Figure 2 on p. 511 of your textbook. Also read pages 510-513 to prepare for the dissection. I will be verbally instructing the dissections but the instructions will closely follow those in these pages. I’ve made some modifications to this section though.

Posted in P2 SBI4U Biology

SBI4U Image of Your Protein

I was asked by a student for a good source for an image of their protein. The most authoritative source for an image is the RCSB Protein Data Bank. As an example I input HLA-DQB1 and selected the first link for Homo sapiens. This data bank will have the images for proteins from any species that have had research done on their version of the protein. Here are some screenshots:

This is the default view they give you, but if you mouse over the image, you can twirl it around to see it from other views as shown below:

This is another image found by a simple Google search from this site: https://www.researchgate.net/figure/Figure-3-Identical-by-state-SNPs-affecting-HLA-DQB1-binding-groove-The-three_fig1_301588887. As you can see this is from a primary research paper and in this image HLA-DQB1 is being affected by SNPs (single nucleotide polymorphisms).

Any one, or all of these images could be submitted. The point to this question in your task is so you get a sense of what your gene product (protein) actually looks like. You can see mine is made of mostly beta sheets with a couple alpha helices. You only have to submit one, but a few from different angles would be good if possible.