Bio 184 Chapter 19 Homework

This figure shows an example of a(n) mutation.

- intragenic -suppressor

What can cause double-strand breaks (DSBs)?

-reactive oxygen species -gamma rays -x-rays

In this figure, two panels are shown. Panel I shows protein A. A first mutation inhibits the function of protein A. In Panel II a second mutation alters protein B to carry out the function of protein A. What is this an example of?

Intergenic suppression

The region where two chromosome pieces break and re-attach to other chromosome pieces is called a chromosomal blank

breakpoint

A silent mutation is a mutation that results in no ______.

change to the amino acid sequence of the polypeptide

The breakage of chromosomes is referred to as a(n) blank blank - break.

double strand

This figure best illustrates what type of mutation? Multiple choice question.

frameshift mutation

Cells that give rise to the gametes such as eggs and sperm are called

germ line

An advantage of ______ is that it provides an error-free mechanism for repairing a DNA double-strand break.

homologous recombination repair

When a cell repairs a double-strand DNA break by the mechanism of nonhomologous end joining, the original DNA sequence at the repair site ______.

may be changed by a small deletion

This figure shows a technique known as

replica plating

A mutation that does not change the amino acid sequence of a polypeptide is known as a(n) blank mutation.

silent

A main advantage of nonhomologous end joining is that it does not require a(n) blank blank, and thus it can take place throughout the cell cycle.

sister chromatid

A breakpoint refers to the region ______.

where two chromosome pieces break and rejoin with other chromosome pieces

A disadvantage of homologous recombination repair in eukaryotes is that it is dependent on ______.

sister chromatids, which are only available during part of the cell cycle

Mutations that occur in a promoter sequence can be divided into two types: blank promoter mutations increase the transcription rate, while blank promoter mutations decrease it.

-up -down

Replica plating is a technique in which ______.

bacterial colonies are transferred from one plate to another with a sterile piece of velvet cloth

This figure best illustrates what type of mutation?

base substitution

The term germ line is used to describe the ______.

cells that produce sperm and eggs

A mutant allele is best defined as an allele that ______.

has a different DNA sequence from the wild-type

An allele that has a DNA sequence different from that of the wild-type is called a(n) allele.

mutant

A heritable change in the genetic material is called a(n) ______.

mutation

The term blank refers to an inherited change in the sequence of the genetic material.

mutation

A change of one base for another is described as a base blank mutation.

substitution

Which of the following statements about promoter mutations is true?

- Down promoter mutations decrease the affinity of transcription factors to the promoter - Up promoter mutations cause the promoter sequence to be more like the consensus sequence