Here is a neat website to review and take yourself farther than we will go in class.
We will be looking at DNA today.
Here is a neat website to review and take yourself farther than we will go in class.
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You can download the file and print it HERE.
Allele — A form of a gene. A gene actually consists of two forms, one on the chromosome that came from the father, the other on the chromosome given by the mother. Aneuploidy — Having extra or missing chromosomes. Chromosome — A very long piece of DNA coiled around some proteins. Each chromosome is a separate strand of DNA. DNA— A very long chemical that can coil up to form a structure known as a chromosome. Dominant Allele — An allele that almost always results in a specific trait, even if the person possesses only one copy Gene — A segment of a strand of DNA that codes for how to make a particular molecule. The molecules it produces will result in a particular trait. Different genes have different lengths. Genotype — The genetic identity of an individual Heterozygous — Having two alleles (forms of the gene) that are different. Homozygous — Having two alleles (forms of the gene) that are identical. Locus — The location on the chromosome where the gene can be found. The plural of locus is loci. Meiosis — The type of cell division that produces cells with half the number of chromosomes than the original cell. This is the process that creates sperm and egg cells. Non-disjunction — An error in the process of chromosome sorting during cell division. Pedigree — A pictorial representation of a family's health history Punnet Square — A tool used to predict the genetic outcome of a mating Recessive Allele — An allele that only results in a specific trait if the person possesses two copies of the recessive allele First Things First Go here: http://www.dnalc.org/ I encourage all of you to poke around on this website. It has some really interesting articles. Is there a genetic cause for ADD/ADHD? From the website http://www.dnalc.org/view/1229-ADHD-Genes.html “We know from studies of identical twins and from family members that if one family member has ADHD, as it is called, there’s a greater risk for developing ADHD in other family members - brothers and sisters etc. We know that there is a heritable component to it – meaning that there is some risk at the genetic level. However we do know, from the same genetic studies that there is a much heavier, much larger influence of environment and experience on ADHD.” Twins? What does this mean Mr. C? Well twin studies are REALLY popular/important because they allow scientists to reduce the number of variables and have a good control group. Twins (NOT fraternal twins) are genetically identical so it can be assumed any differences in their mental makeup are due to "nurture" rather than "nature". Is there a genetic cause for Diabetes? From the American Diabetes Association: http://www.diabetes.org/diabetes-basics/genetics-of-diabetes.html Type 1 and type 2 diabetes have different causes. Yet two factors are important in both. You inherit a predisposition to the disease then something in your environment triggers it. Genes alone are not enough. One proof of this is identical twins. Identical twins have identical genes. Yet when one twin has type 1 diabetes, the other gets the disease at most only half the time. When one twin has type 2 diabetes, the other's risk is at most 3 in 4. Can you answer my question the easy way? If you want it spoon-fed to you click where it says, "Read More" in green. It should be right about HERE!
Make sure you check out these links (courtesy of www.trisomy.org) on the genetic disorders we will learn about today.
Information on trisomy 21 can be found here at http://www.lpch.org/DiseaseHealthInfo/HealthLibrary/genetics/downs.html
Ladies and Gentlemen, |
A quote:
“If this book has a lesson, it is that we are awfully lucky to be here-and by 'we' I mean every living thing. To attain any kind of life in this universe of ours appears to be quite an achievement. As humans we are doubly lucky, of course: We enjoy not only the privilege of existence but also the singular ability to appreciate it and even, in a multitude of ways, to make it better. It is a talent we have only barely begun to grasp.” Archives
June 2013
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