FLVS Biology 3.06

In a certain gene, one DNA base pair is accidentally exchanged for another base pair. However, no change occurs in the amino acid that this codon codes for. What kind of mutation is this?

• A nonsense mutation

• A silent mutation

• A missense mutation

• This is a trick question, this is not a mutation

What is shown in this image?

• It shows one extra chromosome

• It shows a normal karyotype

• It shows a chromosomal deletion

• It shows evidence of polyploidy

Substances that may cause mistakes to be made in the DNA are called

• Mutations

• Mutagens

• Mutants

• Mutant Ninja Turtles

This picture shows which of the following?

• Chromosomal deletion

• Chromosomal duplicaton

• Chromosomal translocation

• Chromosomal inversion

What is true about this mutation?

• This is a frameshift mutation

• This mutation resulted from an insertion or deletion

• This is a silent mutation

• This mutation will result in an elongated protein

What is true about this mutation?

• This is known as a nonsense mutation

• In this mutation, every amino acid downstream from the mutation is changed

• This mutation can result in loss of function for the protein

• This mutation results in a premature stop codon

The codon-amino acid system has redundancy built into it. How so?

• Each codon codes for multiple amino acids

• Each amino acid can be coded for by multiple codons

• The number of codons for each amino acids is always 1

• Any mutation in a codon will result in a functional protein

Name an example of a largely helpful mutation

• Mutation of CFTR in cystic fibrosis

• Albinism

• Bacterial mutations to confer resistance to penicillin

• A mutation in a tumor suppressor gene

Non disjunction of chromosomes can result in which of the following?

• Down syndrome

• Sickle Cell Anemia

• Cystic Fibrosis

• Polyploidy

What is true about sickle cell anemia?

• This can result in misshapen blood cells clogging up blood vessels

• This results from a mutation in the CFTR gene

• This results from an extra chromosome 21

• This is the result of UV light exposure