Search Results (6)

View
Selected filters:
  • DNA
تصنيف الحيوانات من خلال المظهر في مقابل تسلسل الحمض النووي
Conditions of Use:
يمكن إعادة ترتيب المحتوى ومشاركته
Rating

ان موضوع هذا الفيديو الخاص بالوحدة النمطية هو كيفية تصنيف الحيوانات على أساس مدى ارتباطهم. ان الهدف التعليمي الرئيسي هو أن الطلاب سيتعلمون كيفية انتاج أشجار متطورة السلالات على أساس الخواص الفيزيائية وعلى تسلسل الحمض النووي معا. سيتعلم الطلاب أيضا لماذا تكون الموضوعية والطبيعة الكمية لتسلسل الحمض النووي هي الأفضل حين يتعلق الأمربتصنيف الحيوانات على أساس مدى ارتباطهم. تشمل معرفة المتطلبات الأساسية لهذا الدرس أن يتوفر لدى الطلاب بعض الاستيعاب لطبيعة الحمض النووي وأن يكون لديهم الإلمام بقاعدة-قواعد الاقتران ومع كتابة تسلسل الحمض النووي.

الموضوع:
علم الأحياء
علم الوراثة
نوع المادة:
Lecture
Provider:
M.I.T.
Provider Set:
M.I.T. Blossoms
المؤلف:
Megan E. Rokop
Date Added:
06/11/2012
Gene Machine: The Lac Operon (AR)
Conditions of Use:
Read the Fine Print
Rating

Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.

Subject:
Genetics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
George Speigelman
Jared Taylor
John Blanco
Kathy Perkins
Noah Podolefsky
Date Added:
05/01/2010
Molecular Motors (AR)
Conditions of Use:
Read the Fine Print
Rating

Discover what controls how fast tiny molecular motors in our body pull through a single strand of DNA. How hard can the motor pull in a tug of war with the optical tweezers? Discover what helps it pull harder. Do all molecular motors behave the same?

Subject:
Genetics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Kathy Perkins
Meredith Betterton
Michael Dubson
Thomas Perkins
Wendy Adams
Date Added:
12/01/2007
Optical Tweezers and Applications (AR)
Conditions of Use:
Read the Fine Print
Rating

Did you ever imagine that you can use light to move a microscopic plastic bead? Explore the forces on the bead or slow time to see the interaction with the laser's electric field. Use the optical tweezers to manipulate a single strand of DNA and explore the physics of tiny molecular motors. Can you get the DNA completely straight or stop the molecular motor?

Subject:
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Kathy Perkins
Michael Dubson
Thomas Perkins
Wendy Adams
Date Added:
08/01/2007
Phylogenetics
Rating

This activity lets learners participate in the process of reconstructing a phylogenetic tree and introduces them to several core bioinformatics concepts, particularly in relation to evolution. Groups of learners (at least 10) repeat a secret message (five to seven similar-sounding words) like the game "Telephone". In this version of the game, however, learners write and then code what they hear, creating a model of a phylogenetic tree and using a species distance matrix. This resource includes background information about phylogenetic trees, maximum parsimony, and matrix theory (see page 6-7 of PDF).

Subject:
Computer Science
Engineering
Information Science
Education
Life Science
Mathematics
Anthropology
Material Type:
Activity/Lab
Game
Lesson Plan
Provider:
Computer Science Unplugged
Science and Math Informal Learning Educators (SMILE)
Provider Set:
Computer Science Unplugged
SMILE Pathway: Science and Math Activities in One Search
Author:
Brian Mason Scientific and Technical Trust
Computer Science Unplugged
Google Inc.
Jim Becker
Katrin Becker
Truman State University
Date Added:
01/02/2005
Stretching DNA (AR)
Conditions of Use:
Read the Fine Print
Rating

Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring?

Subject:
Genetics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Kathy Perkins
Meredith Betterton
Michael Dubson
Thomas Perkins
Wendy Adams
Date Added:
12/01/2007