Download AS 90715 version 2 Describe the role of DNA in relation to gene

AS 90715 version 2
Describe the role of DNA in relation to gene expression
Level 3 4 Credits
This achievement standard involves the description of the role DNA has in relation to gene
expression and the determination of phenotype.
Achievement Criteria
Achievement
Achievement with Merit
Achievement with Excellence
Describe biological concepts
and processes relating to
gene expression.
Explain biological concepts
and processes relating to
gene expression.
Discuss biological concepts
and processes relating to gene
expression.
Concepts and processes relating to gene expression include:
‰ the role of DNA in gene expression: selected from
o
nucleic acid structure and function
o
protein structure and function
o
the genetic code
o
DNA replication
o
protein synthesis (transcription, translation)
‰ allele interactions: selected from
o
dominance
o
incomplete dominance
o
co-dominance
o
multiple alleles
o
lethal alleles
o
linkage,
o
sex linkage
o
pleiotropy
‰ gene-gene interactions: selected from
o
epistasis,
o
collaboration
o
polygenes
‰ gene-environment interactions: Gene-environment interactions include examples of
modification of phenotype by environment, eg determination of sex in crocodile
hatchlings by temperature.
‰ mutations: selected from
o
gene mutations
o
chromosomal mutations
‰ the control of metabolic pathways by gene expression: selected from
o
simple feedback control in prokaryotes (repressors, inducers), the action of
transcription factors, enhancers in eukaryotes
o
consequences to metabolic pathways resulting from the effect of gene mutation,
eg phenylalanine pathways and PKU.
Terms
•
Describe requires the student to give characteristics of or an account of.
•
Explain requires the student to provide a reason as to how or why something occurs.
•
Discuss requires the student to show understanding by linking biological ideas. It may
involve students in justifying, relating, evaluating, comparing and contrasting, analysing.
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