AP Biology Summer Assignment 2 – Due 8/16/20 –

1. Sketch diagrams of Mitosis alongside Meiosis like page 256 and label the stages (Prophase, Metaphase, Anaphase  and Telophase) with a 2n = 4 (diploid cell with 4 chromosomes).

YOU Must Label and define:

A: Sister Chromatids

B: Centrosome

C: Spindle

D: Homologous Chromosomes

E: Chiasmata

F: Centromere

G: Kinetochores

H: Metaphase plate

*I: allele Y for yellow and allele y for green in pea plants on 1 chromosome   

                            pair that is to be drawn throughout all sketches.

You need only label A – H once in each Mitosis and Meiosis diagram but I want to see the one chromosomal pair marked for the yellow and green allele throughout your comparative sketches.   A good example of this is on page 287, but this diagram is showing 2 different alleles on 2 different chromosomes (with 2 generations) and is not illustrating mitosis. Just Copying diagram 15.2 is not what I am asking for. Reading page 286 might be helpful.

At the end of Meiosis I want to see all the different combinations of gametes possible if the initial chromosome was heterozygous for yellow.  Please or shade or color the other chromosome pairs in the beginning to the end of your drawings.

Mitosis and Meiosis will be sketched side by side so that you can compare and contrast. You should end up with different results for each.

YOUR Sketches need to captured and pasted into the Google Doc that will be separate from the one from for assignment 1. There are many ways to do this and I will help if you need it. Please try to capture and update the new google doc for this assignment as soon as possible so that I may comment on your progress.

2.  Complete question 1, Concept Check 14.1 pg 269- The answer is posted in Appendix A in the back of the book. I do not need to see this work. Understanding how to do this problem will help you solve question 2a which I will want to see your work for. Question 2a is based on completing this question and using either Appendix A or the tutorial video I posted below for this Concept question.

2a: Please use Table 14.1 (pg 265) to determine the dominant and recessive allele for Pod Shape (I) and Stem Length (T). Please use Capital I for the dominant allele in pod shape and the capital T for the dominant allele in stem length. Pea plants that are true breeding for Inflated pod shape and Tall stem length were crossed with pea plants that were true breeding for constricted pod shape and dwarf stems (P generation). The resulting offspring of this initial cross was the same genotype and phenotype and these seeds were planted and self- pollinated (F1 Generation) resulting in a dihybrid cross. 1000 seeds were collected from the offspring of the this dihybrid cross. How many seeds can you predict would have the phenotype of an inflated pod shape and dwarf stems? Please show all work and a Punnett square.

3. Complete question 3, Concept Check 14.2 pg 271 – The answer is posted in Appendix A in the back of the book. I do not need to see this work. Question 3a is based on completing this question which I will demonstrate in video posted below.

4. Explain why the end result of meiosis in part 1 of this assignment, and the statistical probabilities that you get in question 2a and 3a cannot ever be completely correct? Why is there a little deviation? Why are inheritance patterns more complex than predicted by Mendelian genetics? Give at least 3 examples in your explanation.

^{Thus I want answers and work for  1, 2a, 3a, and 4 of this second assignment on the second google doc.}