Curriculum Resources
Take learning to the next level and transform the way you teach with a vast library of ready-to-use, standards-aligned, adaptable curriculum resources. The resources listed below are either available with an Online Learning Subscription which allows you to instruct, assess and track student performance or as individual hands-on classroom resources which can be purchased. Choose from Multimedia Lessons, Curriculum Mastery Games, Flip Charts, Visual Learning Guides, Flash Cards, Vocabulary Cards, and Curriculum Modules available on our online store. PREMIUM ONLINE LEARNING SUBSCRIPTION OPTIONS
  • Select By Standard
  • BROWSE CURRICULUM
    • General Science
    • Life Science / Biology
    • Human Body
    • Earth Science
    • Physical Science
    • Chemistry
    • Math
    • Language Arts
    • Social Studies
 

Crossing-Over

Science, Grade 6

Back
 

Table Of Contents: Crossing-Over

1. Homologous Chromosomes
Homologous chromosomes move together during synapsis in prophase of meiosis I. Proteins hold these chromosome pairs very close together.
2. Crossing-Over
Sometimes homologous chromosomes exchange segments of DNA. This is called crossing-over. When crossing-over occurs, each chromatid ends up with a unique sequence of DNA.
3. Crossed-Over Genes
At the completion of meiosis, the new combinations of crossed-over genes are found in the sex cells.
4. Offspring Variation
Crossing-over adds variation to the offspring and ultimately contributes to the evolution of a species.
© Copyright 2012-2018 NewPath Learning. All Rights Reserved. Privacy Notice * Terms of Use