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

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

2 / 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

3 / 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.

4 / 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.

5 / 20

Why do the modern day population of Tristan De Cunha has a much higher than average incidence of the genetic disorder Retinitis Pigmentosa?

Retinitis Pigmentosa has less effect on eye sight in the bright sunshine.

Everyone without Retinitis Pigmentosa left the island.

One of the original population carried the allele, and all descendants are therefore more likely to carry the rare allele.

6 / 20

Which of the following is the result of a chromosome mutation?

Cystic Fibrosis

Down's Syndrome

Huntington's

7 / 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

8 / 20

Which of the following gene mutations will have the least dramatic effect on the polypeptide produced?

Addition

Substitution

Deletion

9 / 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

10 / 20

As there are now 4 chromatids in each homologous pair, they are sometimes called what?

Tetrads

Quadrads

Quadrats

11 / 20

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

46

69

92

12 / 20

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

13 / 20

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

14 / 20

What does the 'm' stand for in mRNA?

Migrating

Multiple

Messenger

15 / 20

What is a difference between RNA and DNA?

DNA is made of of nucleotides, RNA is made out of amino acids.

DNA uses the genetic code, RNA uses sequences of amino acids.

DNA is double stranded, RNA is single stranded.

16 / 20

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

17 / 20

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

18 / 20

What is the proteome of a cell?

Only those proteins which are expressed (made) by a tissue.

The entire set of proteins that are expressed, or could be expressed by an organism.

Those proteins which could be expressed, but aren't.

The proteins which make up the physical structure of a cell.

19 / 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.

20 / 20

What is the position of gene on a chromosome called?

Locus

Allele

Centromere

Centriole

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