Spec Ref Topic Studied Revised Confident
DNA, genes, and chromosomes
3.4.1 I can describe how DNA is found in prokaryotes
3.4.1 I can describe how histones associate with DNA in
the nucleus to form chromatin
3.4.1 I can explain that mitochondria and chloroplasts
also contain DNA
3.4.1 I can define a gene as a sequence of DNA that
codes for a protein or a functional RNA
3.4.1 I can describe the structure of chromosomes
3.4.1 I can explain that the genetic code is universal,
non-overlapping and degenerate
3.4.1 I can describe the differences between introns
and exons
3.4.1 I can define key words for this topic
N/A I have read beyond the specification on this topic
DNA and protein synthesis
3.4.2 I can define the genome and the proteome
3.4.2 I can describe the differences in structure and
function between mRNA and tRNA
3.4.2 I can describe how mRNA is transcribed from
DNA in the nucleus
3.4.2 I can explain how and why splicing occurs
3.4.2 I can describe how translation occurs, including
the roles of ribosomes, tRNA and ATP
3.4.2 I can interpret and use a codon table
3.4.2 I can define key words for this topic
N/A I have read beyond the specification on this topic
Genetic diversity
3.4.3 I can describe the different types of mutations
and their effect on the DNA sequence
3.4.3 I can explain that mutagenic agents can increase
the incidence of genetic mutation
3.4.3 I can describe how chromosome non-disjunction
leads to mutations in meiosis
3.4.3 I can describe the steps in meiosis to produce
genetically different daughter cells
3.4.3 I can define key words for this topic
N/A I have read beyond the specification on this topic
Genetic diversity and adaptation
3.4.4 I can define genetic diversity in a population
3.4.4 I can describe how genetic diversity allows for
natural selection to occur
3.4.4 I can describe how natural selection occurs
3.4.4 I can explain the differences between directional,
stabilising and disruptive selection with examples
3.4.4 I can describe anatomical, physiological, and
behavioural adaptations with examples
3.4.4 I can define key words for this topic
N/A I have read beyond the specification on this topic
AQA A Level Biology Revision Checklist Topic 4-Genetics