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This video (10:18) is the ninth video in the Crash Course Biology series. It covers relationships among DNA, genes, alleles, and chromosomes and their roles in inheritance


  • Science > General
  • Science > Biology
  • Science > Life Sciences

Education Levels:

  • Grade 9
  • Grade 10
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  • Grade 12
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geneticsbiology evolution genetics heredity aristotle bloodlines gregor mendel mendelian genetics mendelian trait classical genetics chromosome gene polygenic pleiotropic allele ear wax gene somatic diploid gametes sperm egg haploid polyploid dominance dominant recessive heterozygous homozygous phenotype punnett square reginald c. punnett sex-linked inheritance autosome



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Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial
Update Standards?

SCI.9-12.SC.912.L.16.D: Science

Reproduction is characteristic of living things and is essential for the survival of species.

SCI.9-12.SC.912.L.16.1: Science

Use Mendel's laws of segregation and independent assortment to analyze patterns of inheritance.

SCI.9-12.SC.912.L.16.2: Science

Discuss observed inheritance patterns caused by various modes of inheritance, including dominant, recessive, codominant, sex-linked, polygenic, and multiple alleles.

SCI.9-12.SC.912.L.16.3: Science

Describe the basic process of DNA replication and how it relates to the transmission and conservation of the genetic information.
Curriki Rating
On a scale of 0 to 3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2014-08-06.

Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 0

Reviewer Comments:

Brothers John and Hank Green have created these engaging and accurate “crash course” videos on topics ranging from chemistry to world history, biology, literature, and ecology.  Each video is 10 – 15 minutes long and suitable for all ages, though the content (and humor) may be better suited for middle school through adult learners.  You can learn more about the specific contents of this particular video (from the Biology collection) by clicking the information tab above.  These videos serve multiple purposes well from use in the classroom to facilitating one’s own lifelong learning.  
Curriki Review System
August 6, 2014
This video is part of the larger collection called Crash Course Biology. You can learn more about this collection by reading its review and comments. You can also find the…

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