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 resistance to antibiotics by bacteria?

Directional

Stabilising

Convergent

2 / 20

Tristan De Cunha is an island populated by a small number of Britons in the early 1800's. What is this an example of ?

Speciation

Genetic Bottleneck.

Founder Effect

3 / 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.

4 / 20

Which of the following can be a mutagenic agent?

Bacteria

Fungus

Viruses

5 / 20

What type of mutation is this ? ACCTGG becomes ACTGG

Addition

Substitution

Deletion

6 / 20

How does recombination increase variation?

It swaps over the same sections of chromosomes, which will contain the same alleles.

It swaps over the same sections of homologous chromosomes, which may contain different alleles.

It swaps genes between different pairs of chromosomes (e.g No21. with 19) , which will contain different alleles.

7 / 20

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

46

69

92

8 / 20

Before meiosis starts, the primary spermatocyte or oocyte replicates its chromosomes and organelles. What is this phase called?

Prophase

Anaphase

Interphase

9 / 20

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

10 / 20

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

11 / 20

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

12 / 20

What molecule does the tRNA carry?

A specific amino acid

A specific base

A specific fatty acid

13 / 20

In translation, a molecule called tRNA carries a three letter code. What are they called ?

Triplets

Codons

Anticodons

14 / 20

What is the name of the modification of pre-mRNA in eukaryotes?

Translating

Ligating

Splicing

15 / 20

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

Triplets

Codons

Anticodons

16 / 20

In an homologous pair of chromosomes, would alleles be...

Always homozygous ( two copies of the same form).

Always the same allele, but at different Loci.

Always heterozygous ( two copies but with different alleles).

Always at the same locus, but could be different alleles.

17 / 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.

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 the position of gene on a chromosome called?

Locus

Allele

Centromere

Centriole

20 / 20

Which word does NOT describe the genetic code?

Degenerate

Universal

Non-Overlapping

Interrupted

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