DNA mutations notes MHS Douglas

DNA mutations notes MHS Douglas

Mutations happen when DNA is altered

A mutation can be harmless, beneficial or harmful. Many mutations go unnoticed due to their benign nature; however those we notice often create radical results.

Multiple Choice

a mutation of DNA changes gene function. What is the basic function of DNA

• transcribed to create sugars

• transcribed to create protiens

• transcribed to create oxygen

• to make more cells

Mutations which alter the structure of a protein so

that it doesn't function correctly can dramatically change a persons life

Cystic fibrosis causes a decrease in lung function and pancreas.

Sickle cell anemia makes the blood cells sickle shaped instead of round

Multiple Select

Remember that proteins are the building blocks of structures in the body. If the structure is wrong: choose multiple

• the cells may look different

• the cells may function differently

• the cells may not function at all

• the cells may die

Multiple Choice

In the case of gene deletion CCR5 , how did this change affect people

• Increased their death rate

• decreased their life span

• made them less likely to catch some virus/disease

• no effect

Multiple Select

If a single nucleotide changes, the outcoming

• protein chosen by tRNA differs

• protein is the same

• cell dies

Multiple Choice

if a gene sequence is deleted then the mRNA for that gene

• doesn't exist

• doesn't know what to do

Multiple Choice

duplication of a gene makes

• more of the same gene

• no gene

• fewer genes

Poll

when a gene is inverted it

• flips over

• disappears

• is duplicated

Multiple Choice

a translocation is a shift in

• where the gene shows up in the chromosome

• just a few letters in the gene

• the entire chromosome

Multiple Select

types of mutations include

• translocation

• deletion

• inversion

• duplication

Multiple Select

when a gene is completely missing it

• duplicated

• translocated

• inverted

• deleted

Multiple Select

when a gene is backwards or flipped it

• deleted

• duplicated

• transcribed

• inverted

Multiple Choice

mutations can be helpful to an organism and species

• true

• false