Genetic Variation & Information Random Retrieval

This quiz contains all the questions in the Genetic Variation & Information section. The website will pick 20 questions at random.

1 / 20

What type of selection is shown on this graph?

Directional

Stabilising

Convergent

2 / 20

Why do most mutations cause a decrease in reproductive success?

Because a mutation often causes a non-functional protein in the affected organism, leading to a loss of function in certain tissues or organs.

Because the mutation will reduce the production of gametes.

Because the mutation means only infertile offspring are produced.

3 / 20

What do we mean by 'Evolution' in biological terms?

Artificial Selection

Natural Selection

Speciation

4 / 20

The Amish in America are a closed community, which only reproduce with-in their own population. They are descended from 200 Swiss who migrated there. They have a much higher proportion of alleles which cause genetic disorders, rarely seen in the rest of the population. What is this an example of?

Speciation

Genetic Bottleneck

Founder Effect

5 / 20

Which is an example of a Genetic Bottleneck?

Bounty hunters killing Florida Panthers almost to extinction, for a reward in the early 1900's.

A domesticated dog escaping, and breeding with wild dogs.

Two separated populations interbreeding.

6 / 20

Which of the following is true about all mutagenic agents?

They always cause a mutation.

They increase the probability of a mutation.

They are only harmful in large amounts.

7 / 20

During recombination ( crossing over), genetic material can be swapped between which two structures?

Homologous Chromosomes

Sister Chromosomes

8 / 20

How is variation introduced during prophase 1?

Independent Segregation

Crossing Over

Mutation

9 / 20

Is Anaphase 2 more similar to Anaphase 1, or Anaphase in mitosis?

More similar to Anaphase 1.

More similar to anaphase in mitosis.

10 / 20

There are now two identical copies of each chromosome, held together by the centromere. Which term best describes these identical copies?

Homologous Chromosome

Sister Chromatids

Homozygous Chromosomes

11 / 20

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

12 / 20

As the mRNA is fed through the ribosome, complementary base pairing between the mRNA and tRNA mean that amino acids are lined up in a specific order. What level of protein structure is established here ?

Primary

Secondary

Tertiary

13 / 20

Where does modification of pre-mRNA occur?

Cytoplasm

Nucleus

Ribosome

14 / 20

What stops the RNA polymerase?

A STOP codon

The gene ends, and non coding DNA is copied, but cut out later.

The enzyme runs out of ATP.

15 / 20

Where does the enzyme used in transcription bind?

To a double stranded section of DNA.

To the start of a gene (called a promoter).

At the start of the chromosome.

16 / 20

The genetic code on RNA is read in a set of three bases called a...

Triplets

Codons

Anticodons

17 / 20

True or False : The same three bases of DNA (or RNA) code for the same amino acid in every organism ever discovered.

TRUE

FALSE

18 / 20

How many chromosomes do most human cells contain?

23

37

46

48

19 / 20

Describe how prokaryotic DNA is stored

Wound around histone proteins

As pairs of linear chromosomes

Supercoiled

Uncoiled

20 / 20

Which type of DNA is not circular?

Mitochondrial

Plant Nuclear

Chloroplast

Bacterial

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