Source
Scholastic News Online

Scholastic News Online is a free resource with breaking news and highlights from the print magazine.

Available for grades 1-6, Scholastic News magazine brings high-interest current events and nonfiction to millions of classrooms each week.

Additionally, our subscribers have FREE access to Scholastic News Interactive, an exclusive online learning tool featuring digital editions, videos, interactive features, differentiated articles, and much more.


Thoroughbred racing Scientists think racehorses have special speed genes that make them good sprinters.
(John Gress / Reuters)

One Big Speedy Family

Scientists have traced racehorses like Secretariat to a single mare from the 1600s

By Tyrus Cukavac | January 31 , 2012
<p>Scientists studied Secretariat’s DNA to help identify what makes racehorses so fast. (Bettmann / Corbis) </p>

Scientists studied Secretariat’s DNA to help identify what makes racehorses so fast. (Bettmann / Corbis)

What did famous racehorses Secretariat, Seabiscuit, and Man o’ War have in common? Besides being champions at the racetrack, they may all be closely related to each other, according to scientists in the United Kingdom.

Those scientists compared DNA samples from almost 600 horses from 22 different breeds (including some zebras and donkeys). DNA is the genetic code found in all living things that carries information about an organism and its family tree. The researchers also studied the remains of 12 famous horses, like Secretariat, which are housed in museums. The racehorses’ DNA all pointed back to one mare (female horse) that lived in England in the 17th century.

They also found that most champion horses have a combination of two specific genes that affect muscle development in the horses. This special gene combination allows them to sprint, or run very quickly in short bursts, which is an important element of horse racing.

Horse racing is a popular sport all across the world and has many passionate fans. If scientists can identify what makes a horse run fast, some racehorse owners could have an edge in races by buying horses with the right genes.

Scientists are also using this kind of research to learn more about how genes affect all living things, including people. Understanding better how genes work can help scientists find out what genes cause cancer and other diseases, and maybe even develop cures.

  • Teacher Store
  • The Teacher Store  
    New Leveled Bookroom 3rd Edition Grades K-6

    New Leveled Bookroom 3rd Edition Grades K-6

    The NEW Leveled Bookroom 3rd Edition offers over 5,000 inspiring books, across an enormous variety of text types, themes, genres, topics and content areas to put all students on a fast track to mastering complex text. This 3rd edition also includes new print and digital resources and assessment tools that explicitly support college & career readiness.
    What's NEW?!
    Guided Reading Toolkit
    : A BRAND NEW print and digital resource offering critical strategies for using guided reading effectively and to prepare for next generation assessments.
    Digital Resources: Create custom text sets with the Text Set Finder by sorting titles by Guided Reading level, Genre, Theme, and Text Type.
    Assessment Kits: Next Step Guided Reading Assessment from Jan Richardson and Maria Walther provides streamlined assessment tools for data driven instruction!
    Updated Implementation Guide featuring NEW sections addressing:
        -Common Core State Standards
        -Text-Dependent Questions & Close Reading
        -Using Guided Reading to Foster 21st Century Learning Skills


    NEW K-6 Leveled Bookroom Product Components

    Each K-6 Bookroom Includes:
    • 910 Titles (6 copies each)
    • 5,460 Books (GR Levels A-Z, DRA Levels A-80, Lexile Levels BR-1280)
    • Master Title List (PDF)
    • Downloadable Identification Stickers that include each book’s title, author, genre, Guided Reading level, DRA Level, and Lexile level
    • Teaching Cards for every title
    • 2 Resource Kits*
    • 4 Next Step Guided Reading Sets

    *Each Resource Kit Includes:
    • Guided Reading Implementation DVD
    • Guided Reading Implementation DVD Viewing Guide
    • Leveled Bookroom Set-Up Guide
    • 5 Guided Reading Toolkits (Implementation Guide, Flip Chart, and Website access)
    • Text Set Finder Access
    • 15 NEW Implementation Guides which include:
      • Running Records for every level
      • Behavioral Observation Assessments
      • Skills & Strategies Charts
      • Reproducible Genre Bookmarks in English and Spanish
      • Reproducible Check Out Logs
      • Common Core Support

    $26,955.00 You save: 33%
    Scholastic Leveled Bookroom | Grades K-6
    Add To Cart
    Educators Only
    New Leveled Bookroom 3rd Edition Grades K-6
    Grades K-6 $26,955.00
    Add To Cart
  • Teacher Store
  • The Teacher Store  
    Cornerstones of Freedom™: Jackie Robinson Breaks the Color Line

    Cornerstones of Freedom™: Jackie Robinson Breaks the Color Line

    by Andrew Santella

    Dramatic and defining moments in American history come vividly to life in this series designed to make children feel they are on the scene as history is being made Accomplished through text, illustrations, photographs, and engravings, these titles support history, social studies and geography curricula. Index included.

    $4.16 You save: 30%
    Paperback Book | Grade 5
    Add To Cart
    Educators Only
    Cornerstones of Freedom™: Jackie Robinson Breaks the Color Line
    Grade 5 $4.16
    Add To Cart
Privacy Policy
EMAIL THIS

* YOUR FIRST NAME ONLY

* FRIEND'S FIRST NAME ONLY

* FRIEND'S EMAIL ADDRESS

MESSAGE
Here's something interesting from Scholastic.com