point of mud

my muddiest point is i get the phenotype and the genotype mixed up. is there any thing anyone has found out that helps you remember which is which.

Muddiest Point!

my muddiest point is the difference between incomplete dominance and codominance. thnaks!

MUUUUUDDDIEST POINT.

My muddiest point point this unit was PEDIGREES. How do I figure out what their offsprings parental gametes are? i know it has something to do with probablity, but I still don't get it!

dominance say what?

HEY YALL. ITS TESSA. what is the difference between incomplete dominance and co-dominance?? help please. (comment)

Marfan's Syndrome

Marfan’s syndrome is a disorder that affects connective tissue. Connective tissue helps support many parts of your body and holds all your limbs together. When a person has Marfan’s syndrome, their skeleton, heart, eyes, skin, nervous system and lungs are the most common body systems that can be affected. This disorder shows in many different ways. Some have mild symptoms and others have severe symptoms. Some severe symptoms include a collapsed lung, numb legs, a hernia, a heart murmur, or a curved backbone. Mild symptoms include having a long, narrow face, crowded teeth, nearsightedness, stretch marks, and snoring while sleeping. This disorder is caused by a defect in the gene that produces fibrillin. Fibrillin is a protein that makes up connective tissue along with other proteins. Fibrillin is also located on chromosome 15. All people are known to get Marfan’s syndrome. This includes: men, women, children, all ethnic groups and races. When someone thinks they have this disorder, their first step is to visit a medical geneticist. There they can determine if the person has the defected gene. There is not cure yet for Marfan’s syndrome but a lot of treatments can treat symptoms that occur. There are different treatments for each of the body systems. For example, if ones eyes are affected, regular eye check-ups are highly recommended because the doctor can catch and fix any eye problems that are expected. Usually, glasses can correct problems associated with Marfan’s Syndrome. People with Marfan’s Syndrome but do not realize, can die within 48 hours of having symptoms such as chest pains. But, if people catch it early enough and learn how to coupe with the disorder, people can live normal lives.

Muddiest Point

Hi, it's Eunice Lee.
My muddiest point is the pedigrees, I DON'T UNDERSTAND HOW THEY WORK!
Help!

Muddiest Point

My muddiest point today is about autosomal dominant. Is it like recessive and all have to be capitals of only one has to be capital. I need help.

muddiest point

hey guys! heidi again.....

MY MUDDIEST POINTS ARE..................................................................PEDIGREES!!

AND.....................MULTIPLE ALLELES!!!!!! I do not get how pedigrees work and how multiple alleles are supposed to look on a punnett square.

Also what does pure breeding and hybrid mean in genetics???

If you guys can help that would be GREAT!!

el punto en el barro continued

its eleni again sorry! one more thing i almost forgot! i know ive asked this question multiple times in class but could someone please explain it just one last time...? what is autosomal dominance and whats autosomal recessive?? ok sorry and thanks thats it :)

el punto en el barro

hey everyone its Eleni and my question is how do all the punnett squares and crossing tie into what meiosis is? like i get what each punnett square is and when and how to do each cross but i dont understand what all that has to do with meiosis can someone please help me?? thanks :)

MUDDIE POINT

hey guys its kelly and my muddiest point for this unit is the incomplete dominance punnett squares

arent they the same thing as the codominance punnett squares?

My Muddiest Point

Hey guys, its Maggie. My Muddiest Point in this unit is the pedigrees and how you can find the genotype of an individual on the chart if you don't know the parent's genotypes. Please help!

Me Es Scribe!

Today In our shortened class, after we checked in the homework on genetic disorder problems, we took a quiz on 14.2 which involved  disorders caused by individual genes which include Sickle Cell Disease, Cystic Fibrosis, and Huntington's Disease. The quiz also touched on Nondisjunction- which is an error that occurs during meiosis where the homologous chromosomes fail to separate properly.

After the quiz we went over the diseases that were caused by Autosomal dominant alleles (Huntington's disease) and Co- Dominant alleles.

At the end of class we worked with the laptops on a web quest about karyotyping and chromosomal abnormalities.

The next scribe is Jonathan

Scribe o da day

Hey guys it's Shane, and in class today we learned about AUTOSOMAL RECESSIVE DISORDERS and PROBABILITY!!!!

Probability consists of three different things. One of them is EXPECTED. This means the fifty fifty chance. Say you were to flip a coin ten times, you would expect it to land on heads five times and it to land on tails five times. But if you were to ACTUALLY flip the coin it more likely not land five and five. The difference between expected and actual probability would be called the DEVIATION. Deviation also means that if you have more tries than the percent will more likely be close to fifty percent for each side. Say if you were to have had three sons the probability would be 1/8th.

1/2 * 1/2 * 1/2=1/8

You would multiplie 1/2*1/2*1/2 because it is a 1/2 chance of getting a son. As you can see that the answer was smaller because of DEVIATION.

Autosomal Recessive Disorders are NON-SEX disorders, since AUTOSOMAL means non-sex linked. When you have a autosomal recessive disorder you have to have two recessive alleles to be able to have the disorder. BUT, for Autosomal DOMINANT disorders you can have either one or two dominant alleles to have the disease.

The next scribe is Michael M...

ʇsod ǝqıɹɔs s,ʎɐpsɹnɥʇ

WHOAAAA :O I don't know if you noticed but the title is "thursday's scribe post" UPSIDE DOWN! Cool, I know. So, Anka here obviously! Here's what we did in class today, Thursday, the FIRST DAY OF DECEMBER (see what I did there, Christmas AND Hanukkah colors)! WOOTWOOT!

We started off class by correcting our homework, UP 29-31, where we learned how to efficiently cross involving one trait (monohybrid crosses). You had to make sure you knew the difference between homozygous and heterozygous traits. If it asked for homozygous green pods, you had to write, GG, as opposed to heterozygous green pods, Gg, and recessive yellow pods, gg. Then you had to seperate those homologous pairs which results in the seperation of alleles. This process is called segregation of meiosis, as shown in the picture. After that you formed and completed a punnett square and moved on to determine the genotypic and phenotypic ratios. Afterwards, our teacher gave us another sheet with a monohybrid cross to be completed to ensure we could all do it!

Then we went on to watch and take notes on a powerpoint. We talked about Independent Assortment (Mendels law), the process of which alleles seperate independently from eachother which then leads to the formation of gametes. Next, we talked about Incomplete Dominance which is when a cross between two phenotypes produces a third phenotype that is considered a BLENDING of the two different traits.

Ex. straight x curly = wavy

Finally, we talked about Co-Dominance which is when both alleles are dominant and expressed equally (NOT BLENDED).

Ex. white rose x red rose = pink rose

The very last thing we did in class was complete an example of Incomplete Dominance together as a class and start on our homework, UP 33-41.

GOOD LUCK ON YOUR HOMEWORK, it's not bad at all!

NEXT SCRIBE IS.............. YASMIN(: [SORRY] gooooodluck, gurrrrl.

EXTRA CREDIT!

Alright guys... 2 extra credit opportunities!

Click on this link and answer the following questions.

1. What color is the RNA backbone in this activity?

2. What 3 amino acids make up the polypeptide chain at the end of the protein synthesis activity?

First 4 people to email me the answers will get extra credit!

Opportunity #2... click on this link, enter in your FULL name... and complete the 'quiz'. You will get extra credit based on your score. This opportunity will expire on Sunday at midnight!