Discovery of DNA

Today students had a reading quiz on section 12.1 and we recapped the discover of DNA as well as the basic structure.

Students also received their tests from Friday and we went over the test.

Homework: Read section 12.2 and take notes for a reading quiz.

Test & Starting Ch. 12

Today students had a test on Chapter 11: Genetics & Meiosis.

Homework: Read section 12.1 and take notes for a reading quiz. Yes, I realize the section is a bit longer than you usually read. That's OK. You do not need to know the details of each of the experiments described, rather, focus on the bigger picture. What did each of these experiments contribute to science? What was discovered?

You should definitely take notes on the components and structure of DNA.

Review for Chapter 11 Test

Today we had time in class to review chapter 11 for the test tomorrow. Your test has nine short answer questions/problems and 27 multiple choice questions.

Wrapping up chapter 11

Today we wrapped up chapter 11 by learning about gene linkage and nondisjunction disorders. We also review the questions from the dragon genetics lab.

On Friday you will have a test on Chapter 11. In addition to all of the vocab and concepts posted on January 20th, below are some more terms/concepts you will need to be familiar with for the test.

meiosis: specifics will be identified in class

Types of Mutations:
gene linkage
inversion
deletion
duplication
translocation

Nondisjunction: explain and give two examples
monosomy
trisomy

Dragon Genetics

Today students made baby dragons using four autosomes and sex chromosomes. For homework you need to draw your dragon: you can either cut out the dragon pieces at the back of the packet or draw the dragon yourself.

EACH PERSON MAKE MAKE HIS/HER OWN DRAGON.

You also need to answer the questions at the end of the packet (you can see the questions below, click the picture to make the questions larger).

Meiosis & an Update

UPDATED: Instead of a quiz on Tuesday on Chapter 11, you will have a test on Chapter 11 on Friday. Your packet and the worksheets you have been given are your study guide.

Need a reminder about meiosis, watch the Meiosis Square Dance below.



Homework: You have been emailed the Dragon Genetics Lab. Read through the ENTIRE lab. You will have a five question prelab quiz on the lab. You may take notes to use on the quiz. I will have printed copies of the lab for you to use in class.

Variations on Mendel's Principles

Today students had a reading quiz on section 11.3 and we learned about variations on Mendel's principles.

There is a substantial amount of vocabulary in this chapter and in order to successfully solve the problems, you need to be able to understand the questions. Below is a list of the vocab and concepts we have covered so far.

homologous chromosomes gene allele gene locus (loci) geneotype phenotype Autosomal dominant disorder Incomplete dominance Heterozygous Test Cross Monohybrid cross Dominant Law of Segregation Law of Independent Assortment P, F1, F2 etc. generations

Pleiotropy Recessive Pedigree chart Codominance Autosomal recessive disorder Homozygous Genotypic Ratio Polygenic trait Carrier Sex-linked traits Genetic Disorders Chorionic Villus Sampling Achondroplasia Probability Phenotypic Ratio

On Friday we will be starting Meiosis and learning more about crossing over and the importance of genetic variation. On Monday we will do a 'dry lab' and make baby dragons.

Since you have already had to read section 11.4, there is no homework for Friday. However, you would benefit from re-reading the section if you were confused.

Test Crosses & Pedigrees

Homework: Read sections 11.3 and 11.4. You will have a reading quiz. For this reading quiz, you do NOT need to do all of the drawings for meiosis, but you should take notes on the broad concepts and be able to identify the differences between mitosis and meiosis.

Starting Genetics

Today we started chapter 11. Below are your homework problems. You do not need to write out the problems, just the answers.

A. For each genotype, indicate whether it is heterozygous (HE) or homozygous (HO)

1. AA ____ 2. Bb ____ 3. Cc ____ 4. Dd ____

5. Ee ____ 6. ff ____ 7. GG ____ 8. HH ____

B. For each of the genotypes below, determine the phenotype.

Purple flowers are dominant to white flowers
9. PP ___________________________
10. Pp ___________________________
11. pp ___________________________

Brown eyes are dominant to blue eyes
12. BB ___________________________
13. Bb ___________________________
14. bb ___________________________

C. For each phenotype, list the genotypes.

(Remember to use the letter of the dominant trait)

Straight hair is dominant to curly. 15. ____________ straight 16. ____________ straight 17. ____________ curly Pointed heads are dominant to round heads. 18. ____________ pointed 19. ____________ pointed 20. ____________ round

D. Set up the square for each of the crosses listed below.

The trait being studied is round seeds (dominant) and wrinkled seeds (recessive)

21. Rr x rr 22. What percentage of the offspring will be round? ___________
23. Rr x Rr 24. What percentage of the offspring will be round? ___________
25. RR x Rr 26. What percentage of the offspring will be round? ___________

E. A TT (tall) plant is crossed with a tt (short plant).
What percentage of the offspring will be tall? ___________