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

How do Microbiologists test for bacterial susceptibility to antibiotics?

Measuring the size of bacterial colonies.

Measuring the Inhibition Zone.

Monoclonal Antibodies.

2 / 20

The development of antibiotic resistance is an example of what type of selection?

Natural Selection

Artificial Selection

Stabilising Selection

3 / 20

What type of selection is shown on the graph?

Length of a giraffe's neck.

Thickness of blubber in a weddel seal.

Human Birth Weight.

4 / 20

Babiana Ringens is a South African plant, which flowers on the ground. They are pollinated by birds, so to attract them they have evolved a sturdy stalk with no leaves or flowers which acts as a bird perch.

Physiological

Anatomical

Behavioural

5 / 20

Stray dogs in the Moscow Subway have learnt to beg for food, and are able to identify humans most likely to feed them. What type of adaptation is this ?

Physiological

Anatomical

Behavioural

6 / 20

A mutation in a population of bed bugs in New York City caused the bedbugs to have a thicker, waxier exoskeleton. Why will the allele for thicker , waxier exoskeleton in bed bugs increase in the population?

The thicker exoskeleton makes it easier to lay eggs. More eggs are laid, so more bed bugs with thicker exoskeleton.

The thicker exoskeleton means that the insecticide used to kill them is no longer effective. The thicker exoskeletal bed bugs are more likely to reproduce and pass on the new allele.

The waxy exoskeleton is waterproof, so they are less likely to drown.

7 / 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.

8 / 20

After a genetic bottleneck, what is true about the alleles of the survivors?

There is the same number of different of alleles.

There are fewer alleles in the surviving population.

There are more alleles in the surviving population

9 / 20

What happens to the number of different alleles during a genetic bottleneck?

They are increased, because of an increase in mutations.

They are reduced, because those wiped out alleles give a disadvantage to the organism.

They are reduced due to massive population reduction, but which alleles are removed is due to chance.

10 / 20

Some gene mutations will have no effect at all on the polypeptide, why not?

The genetic code is universal

The genetic code is degenerate

DNA is double stranded

11 / 20

What type of mutation is this ? ACCTGG becomes ACTGG

Addition

Substitution

Deletion

12 / 20

What type of mutation is this ? ACCTGG becomes ACGTGG

Addition

Substitution

Deletion

13 / 20

What is a gene mutation?

The addition of a marker molecule onto the DNA

A chemical which binds to DNA

A change in the DNA base sequence

14 / 20

How many chromatids are present in a human cell at the start of meiosis?

46

69

92

15 / 20

On this diagram, what does D represent?

Locus

Homologous Chromosomes

Centromeres

16 / 20

How many tRNA molecules can fit into a ribosome at any time?

2

3

4

17 / 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.

18 / 20

DNA is read in sets of three bases called what?

Triplets

Codons

Anticodons

19 / 20

On this diagram, what does D represent?

Locus

Homologous Chromosomes

Centromeres

20 / 20

What is a 'sister chromatid' or 'sister chromosome'?

The same chromosome ( same number e.g. 21) but possibly with different alleles. Can be linear, or X shaped.

An identical copy of a chromosome, with identical alleles. Joined by the centromere to form a X shape.

A pair of linear, single chromosomes.

Two X sex- chromosomes (XX) .

Your score is

0%

Recent Posts

Categories