Chromosomal Mutations

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Chromosomal Mutations

Easy as Pie Paradise Mashed Potatoes

Chromosomal Mutations Target: I will be able to identify the main types of chromosomal mutations. Mutation: A sudden change in the structure or the amount of genetic material. Mutations, Crossing Over, and Independent Assortment increase genetic variation in a population. Pg. 39

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.

2. Duplication/Addition: When a piece of chromosome is added to the homologous chromosome. 3. Translocation: When a piece of chromosome is added to the nonhomologous chromosome.

4. Inversion: When the order of genes is switched in a chromosome. 5. Nondisjunction: When disjunction doesn’t occur correctly during anaphase of meiosis, so the gamete has an extra or missing chromosome.

R r R r R r R r R r R r

4. Inversion: When the order of genes is switched in a chromosome. 5. Nondisjunction: When disjunction doesn’t occur correctly during anaphase of meiosis, so the gamete has an extra or missing chromosome. Chromosomal Mutations Summary:

Identifying Mutations Activity Father: Mother: A B C D E a b c d e t w x y z A B C D E a b c d e T W X Y Z t w x y z T W X Y Z Pg. 38

PROBLEM 1 A B C d e T W X Y A B C D E T t w x y z t w x y z Crossing Over of d&e genes on Dad Deletion of Z gene on Dad Inversion of W&X genes on Dad Duplication (Addition) of E gene on Mom Translocation of T gene on Mom Nondisjunction of t-z chromosome on Mom A B C d e T W X Y A B C D E T t w x y z t w x y z