1. Chromosomal Mutations

2. Easy as Pie
Paradise
Mashed Potatoes

3. Chromosomal Mutations
Target: I will be able to identify the main types of chromosomal mutations.
Mutations, Crossing Over, and Independent Assortment increase genetic variation in a population.
Pg. 35

4. Crossing Over: exchange of genetic material between homologous chromosomes.
a b c d e
a b c D E
A B C D E
A B C d e

5. Mutation: A sudden change in the structure or the amount of genetic material.

6. Types of Chromosomal Mutations:
Chromosomal Mutation: An abnormal change in the structure of all or part of a chromosome or the number of chromosomes.
Types of Chromosomal Mutations:
1. Deletion: When a piece of chromosome is missing. t w x y z t x y z

7. 2. Duplication/Addition: When a piece of chromosome is added to the homologous chromosome.x y z t
w x
y y z

8. 3. Translocation: When a piece of chromosome is added to the nonhomologous chromosome.
w x y z
a b a b c d e t w x y z

9. 4. Inversion: When the order of genes is switched in a chromosome.x w t y z t w x y z

10. 5. Nondisjunction: When disjunction doesn’t occur correctly during anaphase of meiosis, so the gamete has an extra or missing chromosome.
The pulling apart of homologous chromosomes or sister chromatids is called disjunction  a b c d e a b c d e t w x y z a b c d e t w x y z T W X Y Z A B C D E A B C D E T W X Y Z

11. R r
R r
R r
R r R r R r

12. Chromosomal Mutations
Summary:

13. Diagraming Mutations Deletion Duplication (Addition)
Translocation Inversion
Nondisjunction Crossing Over
In each box draw and example of each mutation by showing the original parent chromosome(s) and then the resulting mutation.
*Use a minimum of 4 colors*
Pg. 34