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The Ridings High School
B
BTEC First Certificate Applied Science
Unit 5: Biological Systems
The Ridings High School
Science Faculty
Course title: BTEC First Certificate in Applied Science
Tutor name: Mr Mayo
Assignment title:
Genes and variation
Learner name
6th October 2008
Start date:
Deadline:
20th October 2008
Unit 5: Biological Systems
Scenario
You are in a situation where you are required to explain the inheritance of a disease to a group of assistant
practitioners within a hospital. To start with you are going to have to explain where DNA and genes are
located in the cell and how genes and chromosomes can pass on information to other cells. You need some
visual materials which will help you to get your point across to them as well as some written explanatory
materials. The tasks will help you to prepare materials for your presentation.
Assessment evidence:
Unit
Grading criteria
The grading criteria that this assignment relates to:
U5
P4:
describe the relationship between chromosomes, DNA and genes
M4:
describe (using examples) how variation within a species brings about
evolutionary change
D4:
explain how genes control variation within a species using a simple
coded message.
Summary assessor’s feedback
Internal verifier’s comment
Learner’s signature
Unit 5: Biological Systems
Task 1
The Ridings High School
B
BTEC First Certificate Applied Science
Unit 5: Biological Systems
Genes and variation
Unit 5 learning outcome 3: Understand that genes are responsible for inheritance, and
variations within species, leading to evolutionary change.
Unit content covered:
Genes control cell function: DNA code; translation; structure of a protein,
e.g. enzyme; control of cells’ activities
DNA molecule: coded sequence of bases (A, C, T, G)
Evolutionary change: role of genetic variation, environmental conditions.
Task 1
Prepare an ‘action’ poster or model to demonstrate the structure of DNA showing the
base sequences, the formation of messenger RNA and the process of protein
formation from a series of amino acids assembled from the RNA instructions.
Prepare a set of ‘slides’ to illustrate your explanation
Research the topic first using relevant text books or websites then use PowerPoint or
a series of illustrations to show the following steps in the process:
 DNA Double Helix molecule
 The base pairs along the two sides of the double helix
 The process of DNA Transcription to make messenger RNA
 The process of RNA Translation to make proteins from amino acids
P4
Task 2
Summarise the causes of gene and chromosome mutation and suggest how these
changes can bring about evolutionary changes by the process of selection using
named examples
Explain how DNA can be changed by chemicals or forms of radiation such as UV, Xrays or gamma rays.
M4
Task 3
Using diagrams, prepare a leaflet on the way in which genes carry inherited
information from one generation to another via the process of meiosis and gamete
formation, and through fertilisation. Refer to simple monohybrid inheritance and
examples of this in human inheritance; describe what is meant by discontinuous
variation and continuous variation.
D4
The grading criteria that this assignment relates to:
P4:
describe the relationship between chromosomes, DNA and genes
M4:
describe (using examples) how variation within a species brings about evolutionary
changes
D4:
explain how genes control variation within a species using a simple coded message.
Unit 5: Biological Systems
Task 1