Mutations, gene flow and gene drift

A change in a gene

• replication

• translation

• mutation

• transcription

The more genetic variation a population has,

the more likely it is for some individuals to

• evolve

• migrate

• survive

• mutate

A population of flowers on one side of a river transports pollen to flowers on the other side of the river

• Gene Flow

• Genetic Drift

What type of mutation involves adding or deleting bases from the DNA, which results in new codons (a shift in the reading of the codons)?

• point mutation

• frameshift mutation

• silent mutation

• chromosomal mutation

Original DNA = TAC GAC TTG AAT

Mutated DNA = TAC GTA CTT GAA T

What type of mutation has occurred?

• Chromosomal mutation

• Point mutation

• Frameshift mutation due to adding extra base

• Frameshift mutation due to deletion of base

Select the best answer based on the image.

• Gene Flow

• Genetic Drift

One of the original Amish settlers who founded a new area for them had a rare, genetic disorder which causes short limbs and extra digits. Now, many within the population show this trait.

• Gene Flow

• Genetic Drift

A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.

• gene pool 
• founder effect
• bottleneck
• mutation

What are considered "negative" mutations?

• mutations in the DNA sequence that changes the resulting protein and harms the organism

• mutations in the DNA sequence that changes the resulting protein and benefits the organism

• mutations in the DNA sequence that produces the same protein

• all mutations are considered bad and harm the organisms

Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small.  2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.

• gene flow
• bottleneck
• mutation
• founders