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

Which of the following is an example of directional selection?

Human Birth Weight

Length of a giraffe's neck.

Best camouflaged colour of mouse's coat in woodland.

2 / 20

Around 10,000 years ago, humans developed the ability to make lactase in adulthood, and so were able to digest diary products.

Physiological

Anatomical

Behavioural

3 / 20

The Western Corn Rootworm has developed resistance to a protein pesticide found in transgenic crops. The protein no longer damages the digestive tract of the insect.

Physiological

Anatomical

Behavioural

4 / 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

5 / 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.

6 / 20

What does 'Differential Reproductive Success' mean?

Some individuals within a population are more likely to reproduce than others.

Different species have different reproductive success.

More organisms reproduce successfully over time.

7 / 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.

8 / 20

Which of the following will reduce genetic diversity in a population?

Mutation

Genetic Bottleneck

Migration

9 / 20

During Metaphase 1, the homologous pairs can line up with either the paternal chromosome above, or the maternal chromosome above. What is this phenomenon called?

Recombination

Chiasmata

Independent Segregation

10 / 20

Which number represents metaphase 1 of meiosis?

4

5

6

11 / 20

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

12 / 20

What type of bond forms between the amino acids?

Glycosidic

Phospho-diester

Peptide

13 / 20

Where does translation take place?

Cytoplasm

Nucleus

Ribosome

14 / 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.

15 / 20

What do H and h represent?

Different genes

Different Alleles

Different loci

16 / 20

What is an 'homologous chromosome'?

The same chromosome ( same number e.g. 21) but possibly with different alleles

An identical copy of a chromosome, with identical alleles.

When two alleles are the same, on a pair of chromosomes.

Any two chromosomes.

17 / 20

How many chromosomes do most human cells contain?

23

37

46

48

18 / 20

What is the genome of a cell?

All the genes which code for a protein in cell.

All the genes which code for a protein or a functional RNA in a cell.

All the genetic material in exons, in a cell.

All the genetic information, both introns, exons and non-coding DNA in a cell.

19 / 20

What is a gene?

A section of DNA

A section of DNA which codes for a protein

A section of DNA which codes for a functional RNA

A section of DNA which codes for a protein or a functional RNA.

20 / 20

Describe how prokaryotic DNA is stored

Wound around histone proteins

As pairs of linear chromosomes

Supercoiled

Uncoiled

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