realSCIENCE
De La Salle College Online - INSPIRING THE IMAGINATION AND SEEKING NEW HEIGHTS
AS2.5 Genetic Variation (External)
This externally assessed standard is worth 4 credits and is essential for
understanding at Level 3 and beyond.
You will cover a large amount of content and the teaching  component will take
approximately 10 weeks of class time.

The following is a comprehensive list of all the key areas that you must cover for AS2.5. This topic will introduce a lot of new terminology and concepts.

what you need to know!

Genetic variation and change involves the following concepts:

  • sources of variation within a gene pool
  • factors that cause changes to the allele frequency in a gene pool. 

Biological ideas and processes relating to sources of variation within a gene pool are selected from:

  • mutation as a source of new alleles
  • independent assortment, segregation and crossing over during meiosis
  • monohybrid inheritance to show the effect of co-dominance, incomplete dominance, lethal alleles, and multiple alleles
  • dihybrid inheritance with complete dominance
  • the effect of crossing over and linked genes on dihybrid inheritance. 

Biological ideas and processes relating to factors affecting allele frequencies in a gene pool are selected from:

  • natural selection
  • migration
  • genetic drift.

resources

AS 2.5 Genetic Variation.pdf
click to download
Monohybrid crossses.pptx
click to download
Meiosis.pptx
click to download
Dihybrid crossses.pptx
click to download

animations

Practice papers

Bio 2.5 Questions 12.doc
click to download
Bio 2.5 Questions 13.docx
click to download
Biology 2.5 Questions 14.docx
2014 Prelim Paper
Bio 2.5 Answers 2015 Mid Year.docx
click to download
Biology 2.5 ANSWERS PRELIMS 2015.docx
click to download

answers for papers

Bio 2.5 Assess sched 12.doc
click to download
Bio 2.5 Assessment schedule 13.docx
click to download
Biology 2.5 Assess Sched 14.docx
click to download
AS2.5 Recommended Answers.pptx
click to download

videos

Mutations I
Natural Selection Examples
Mutations II
Punnet Squares
Trait Variation
Linked Genes
Natural Selection
Genetic Drift