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Warm Up Activity. Quietly work on the “counting chromosomal content” worksheet. (5 minutes). Question?. What does DNA code for?. ANSWER. The nitrogen bases found in DNA code for the proteins your body makes. Those proteins determine what traits you will have. (Eye color, hair color etc..).

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Warm up activity

Warm Up Activity

Quietly work on the “counting chromosomal content” worksheet.

(5 minutes)


Question

Question?

What does DNA code for?


Answer
ANSWER

  • The nitrogen bases found in DNA code for the proteins your body makes. Those proteins determine what traits you will have. (Eye color, hair color etc..)


Agenda
Agenda

  • Chocolate chip cookie recipes

  • Notes on mutations

  • Mutations Worksheet


Crossing over
Crossing Over

Crossing Over = The exchange of genetic material between homologous chromosomes

occurs during meiosis and contributes to genetic variability


Let s review
Let’s Review

  • Replication = copying DNA

  • DNA  Proteins  Traits

  • If the DNA is “wrong” it can make the wrong proteins which will code for the wrong traits.



Mutations during replication
MUTATIONS DURING REPLICATION

  • Mutations in DNA will cause a change in Protein.

  • A change in the protein will cause a change in Traits. ex: hair color, eye color


There are different types of mutations
There are different types of mutations:

  • Substitution

  • Insertion (sometimes repeated)

  • Deletion/omission


Example of substitution
Example of Substitution

  • The/car/hit/the/cat

  • Substitute a p or the r

  • The/cap/hit/the/cat


Example of insertion
Example of Insertion

  • The/car/hit/the/cat

  • Insert a letter

  • The/aca/rhi/tth/eca/t


Example of deletion
Example of Deletion

  • The/car/hit/the/cat

  • Delete a letter

  • The/cah/itt/hec/at


  • These mutations cause:

  • harm: Change in the protein

  • benefit: Change in the protein

  • no effect: No change in the protein


Mutations during cell division
MUTATIONS DURING CELL DIVISION

  • During Mitosis – mutations will effect body cells

  • During Meiosis – mutations have the potential to be passed on to offspring


Let s practice
Let’s Practice

  • Original strands:

    A C T C

    T G A G

  • After Replication:

    A C T C

    T G A G A

    What type of mutation is this?


  • Original strands:

    A C T C

    T G A G

  • After Replication:

    A C T C

    T G A T

    What type of mutation is this?


  • Original strands:

    A C T C

    T G A G

  • After Replication:

    A C T C

    T G A G T

    What type of mutation is this?



Mutation Worksheet effect from a DNA mutation.


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