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

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.

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

Two of the above mutations will always cause a non functional protein. Why?

They add or remove an amino acid.

They alter both strands of the double helix.

They cause a frame-shift in the triplet code.

6 / 20

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

Homologous Chromosomes

Sister Chromosomes

7 / 20

What is the order of events from the diagram for Meiosis division 2?

3, 4, 1, 6

7, 4, 2, 6

6, 7, 5, 2, 8

8 / 20

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

9 / 20

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

10 / 20

What word do we use to describe the pairs of chromosomes?

Homologous Chromosomes

Homozygous Chromosomes

Sister Chromatids

11 / 20

What is translation?

DNA into pre-mRNA

pre-mRNA into mRNA

mRNA into amino acid sequence

12 / 20

Where does modification of pre-mRNA occur?

Cytoplasm

Nucleus

Ribosome

13 / 20

During Transcription, the two DNA strands are separated. What attracts free floating RNA nucleotides to the exposed bases?

Negative charges on the phosphate group.

Partial charges on the organic base.

OH groups on the deoxyribose.

14 / 20

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

Triplets

Codons

Anticodons

15 / 20

What word describes the fact there is more than one set of three bases for each amino acid?

Polypeptide

Polygenic

Degenerate

16 / 20

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

17 / 20

In an homologous pair of chromosomes...

Both chromosomes are from the mother.

Both chromosomes are from the father.

One of the pair came from the mother, and the other came from the father.

he chromosomes are clones of each other.

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 of the following is not coded for by a gene?

Polysaccharide

Ribosomal RNA

tRNA

Polypeptide

Your score is

0%

Recent Posts

Categories