Flashcards in Ch. 18 Deck (15):
The term ___ refers to a heritable change in the genetic material.
Positive side of mutations
They are the foundation for evolutionary change needed for a species to adapt to changes in the environment
Negative sides of mutations
New mutations are much more likely to be harmful than beneficial to the individual and often are the cause of diseases
Mutations provide ___ ___.
Mutations can be divided into three main types:
- chromosome mutations
- genome mutations
- gene mutations
Chromosome mutations -
Changes in chromosome structure
Changes in chromosome number
Relatively small change in DNA structure that affects a single gene
A ___ ___ is a change in a single base pair.
A point mutation can involve a ___ ___.
A ___ is a change of pyrimidine (C, T to another pyrimidine or a purine (A, G) to another purine.
A ___ is a change of a pyrimindine to a purine or vice versa.
Transitions are more ___ than transversions.
___ ___ are those base substitutions that do not alter the amino acid sequence of the polypeptide.