Monohybrid Cross - Punnett Square

Monohybrid Cross - Punnett Square 

Create and analyze Punnett Squares (monohybrid crosses) 

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17 Video Interactions 


  1. 00:00:04 

    Take notes on the steps for a Punnett Square on the right side - Title: Monohybrid Cross

     

    Write the example on the left side

    • Use a ruler (straight lines) and colors for this example 

     

    These notes and this example will be checked off

     

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  2. 00:00:17 

    Genotype is...

     

    • the genetic makeup of any given trait 
    • the physical characteristic (descriptor) of any given trait 

  3. 00:00:28 

    Recessive is...

     

    • the trait that is expressed 
    • the trait that is hidden 

  4. 00:01:08 

    Which height trait in pea plants is dominant?

     

    • short 
    • tall 

  5. 00:02:04 

    What would be the height genotype for a hybrid pea plant?

     

    • TT 
    • Tt 
    • tt 

  6. 00:02:19 

    What would be the height genotype for homozygous recessive pea plant?

     

    • TT 
    • Tt 
    • tt 

  7. 00:02:42 

    Add this to notes:

    The dominant allele is always expressed (shows up) in the heterozygote/hybrid

     

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  8. 00:02:57 

    Update notes

     

    • Steps on the right
    • Example on the left
     

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  9. 00:03:03 

    For this example on the left side, be sure to use a ruler for straight lines, and colors

     

    Be sure to take notes on the steps on the right side

     

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  10. 00:05:01 

    Create and/or update the Punnett Square now 

    • ruler
    • colors
    • Be sure to model the Law of Segregation for full credit 

    Remember this will be checked off

     

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  11. 00:07:07 

    Update notes and Punnett Square

     

    • ruler
    • colors
    • Law of Segregation
     

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  12. 00:08:00 

    What would be the phenotypic ratio for this cross?

     

    • 2 tall : 2 tall 
    • 1 tall : 1 tall 
    • 2 tall : 2 short 
    • 1 tall : 1 short 

  13. 00:08:51 

    Write the correct phenotypic ratio for this cross under the Punnett Square

     

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  14. 00:08:55 

    What would be the genotypic ratio for this cross?

     

    • 2 Tt : 2 tt 
    • 1 Tt : 1 tt 

  15. 00:09:26 

    Write the correct genotypic ratio for this cross under the Punnett Square

     

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  16. 00:09:44 

    What would be chances of the offspring being tall?

     

    • 50% 
    • 25% 
    • 'bout tree fiddy 

  17. 00:09:53 

    Complete: notes and Punnett Square

    Summarize: write a summary for these notes

    Question: write one or two 'why' or 'how' questions you still have or think others in class would still have after this lesson - be content specific: do not just write 'how do i make a Punnett Square?'

    Practice problems will be assigned in class...be ready

     

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