Quiz and Bio Days

Thursday

We handed in UP 67-71 and then took a quiz. The quiz lasted thirty minutes so if you were not here this day then you still have to take it. After we finished our quiz we had to pick a disease from the fallowing that we had either never herd of or were particularly interested in;

- Cystic Fibrosis - Marfan's Syndrome - Sickle Cell Disease

- Huntington's Disease

- Hemophilia

- Hemochromatosis

- Tay- Sachs

- Fragile X

- Duchenne's Muscular Dystrophy

- Neurofibromatosis

- Down Syndrome

- PKU

(also found on page seven in our unit packet)

http://gbslibguides.glenbrook225.org/content.php?pid=166846

After we had picked our disease then we went to the web sight above and looked up our disease and answered the questions on pages seven and eight. The first link is the most helpful of them all.

Friday

Today we met in the lyceum for bio day. The movie we watched was called "Dogs". It was about how dogs descended from wolfs. It was a big mystery for a very long time. They finally had an idea where there were some breeders that only took the two calmest dogs and breeding thus driving the gene for being calm into there genetic material, creating dogs. They figured out they did this for many different things for instance they thought for creating some dogs that can run really fast in the old days only feeding the dogs that would catch food so they developed to becoming the fastest dogs yet. That was how they believed all of the different breeds of dogs came to be.

Alan is the next scribe

Homework

Read 14.3 and 15.2 while answering the questions on pages 73, 74 and 79 of your unit packet

Finish UP 7-8

Genetic Disorders and Karyotypes

In class today, we started off by getting two cookie monster stamps for the pedigree and genetic disorder problems.  We discussed how to analyze a pedigree chart to look at the inheritance of traits in families.  Remember, you need to look at the parents and the children of a given individual to try and determine the genotypes.  You cannot always determine the genotype with the information given.  For example, Question #3 on page 49... you cannot determine the genotypes of individuals E I J M N.

We then looked at a few images of karyotypes and talk about how to match chromosomes and analyze karyotypes.  Below is an image of a karyotype... do you know what genetic disorder this person has???

That's right!  Kleinfelters Syndrome!

Below are a few good links to practice analyzing Karyotypes.

http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html

http://learn.genetics.utah.edu/content/begin/traits/karyotype/

http://learn.genetics.utah.edu/content/begin/traits/predictdisorder/


For tomorrow:
1. QUIZ!
2. Complete UP 67-71
3. Look at online karyotyping links

Next Scribe is Celia

Shortened Tuesday!

Agenda:

• Get second stamp for unit packet 39-46
• Take notes on genetic disorders
• Assign homework: Unit packet 47-52
• Assign extra practice pages in unit packet: 53-56 (**optional)

Because all the classes were shortened, we had little time to do much in class. We did notes and then had some time to continue our homework.

Notes:

Autosomal Recessive Disorders

• Tay Sachs: Degenerative nerve disease, death early
• Cystic Fibrosis: Causes mucus build up in the lungs, digestive and liver problems
• Phenylketonuria: lack of enzyme needed to break down phenyl

Auto Dominant Disorders

• Huntingtons Disease: Nervous system disease causes loss of muscle function
• Achondroplasia: A form of dwarfism

Codominant Disorders

• Sickle cell anemia- abnormal shaped RBCs don't carry o2 effectively
• H^A H^A- normal
• H^S H^S- sickle cell disease
• H^A H^S- resistant to malaria

Chromosomal Abnormalities and Nondisjunction

• Nondisjunction in meiosis results in gametes with abnormal chromosome numbers
• Most cases produce gametes that are not viable

REMEMBER: Quiz is on Thursday!

The next scribe is: Olivia Pullano

Genetic Disorders

Agenda: 

• Take out UP 40-41 w/ stampsheet
• Talk about X-linked chromosomes
• Work on UP 43-52

  Today we started off the day talking about how NASA had discovered a bacteria without phosphate in its DNA. Instead, it has arsenic, which is poisonous to us. You can find more information about this on Mrs. Stien's previous posts.

  Next we talked about X-linked chromosomes.

Multiple Alleles- Blood Types

• The "A" and "B" alleles are codominant to each other 
• The O allele is recesive

Possible phenotypes and genotypes include:

 Phenotypes                                        Genototypes

·         Type A                                    I^AI^A or I^Ai

·         Type B                                    I^BI^B or I^Bi

·         Type AB                                 I^AI^B

·         Type O                                   ii  

Blood Type Chart

Human Chromosomes

• 22 pairs of autosomes and 1 pair of sex chromosomes - autosomes are all of the chromosomes that aren't sex chromosomes 
• Many genetic disorders are autosomal recessive 
• Sex- linked disorders are on the X chromosome; many are recessive 

Sex-Linked Disorders

• allele is only found on the X chromosome
• more common in men; men cannot be carriers

If you're still confused and want more information, Mrs. Stein posted some videos that should be helpful.

Homework:

• Read 14.2 and go online to https://www.pearsonsuccessnet.com/snpapp/login/login.jsp and do the activities and the quiz for that section
• UP 43-46 (due tomorrow)
• UP 47-52 (due Wed.) 
• Quiz Thur. 

The next scribe will be Julie

Sex Linked Problems

Connection between Meiosis and Mendalian Genetics

One of your classmates asked "what is the connection between meiosis and what we are doing now (ie: punnett square problems)... below is what I wrote as I explained the answer. Can you follow it?

Multiple Alleles

I hope you enjoy this one! it took me FOREVER to get it...i kept screwing up! Also, be sure to look at my post from last night!!!

Meiosis.. NOT Mitosis!

Welcome back gang!  Today was a first day back after a LONG Thanksgiving break.  Everyone was thrilled to be back at school... I know I was! 

Today we started talking about meiosis.  First of all, meiosis is NOT mitosis... they are quite different processes... though they make look similar the outcomes are very different. Mitosis is normal cell reproduction.  Meiosis, however, is the process that makes egg and sperm.

We spent a lot of time talking about chromosome numbers and the difference between haploid and diploid cells.  It is very important that you understand that diploid cells have HOMOLOGOUS pairs of chromosomes... in other words, two copies of each chromosome....  Homologous chromosomes contain the same genes in the same location on the chomosome, however, they may be different FORMS of the gene.... that is because one copy came from your mom and one came from your dad.

If you are confused about what happened in class today, it is ESSENTIAL for you to get it squared away ASAP because the coming stuff will confuse you more if you don't have a solid foundation. 

Below are the notes from today's class if you missed it!

11/29/10 Class Notes

View more presentations from Deb.

This always makes me laugh! Anyone wanna learn it an sing it for the class???






A good summary of meiosis...but there are others out there on youtube... find 'em! Post 'em!

Homework for tonight...
-UP 13-14 - be sure to color and annotate (ie: notes in the margins)
-READ 11.4... do either a flow map titled "Steps of Meiosis" or a double bubble map titled "Meiosis vs. Mitosis"

Next scribe is Andjela!