Subject content

1.  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.

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

• mutation as a source of new alleles, DNA and mutations

• 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.

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

• natural selection

• migration

• genetic drift

• genetic drift simulation

• 
  

https://www.youtube.com/watch?v=KlYxC8CLfo0

4. Understanding of DNA including Meiosis and Mitosis 

Dihybrid crosses

https://www.youtube.com/watch?v=VzDMG7ke69g&t=261s  a clip with a focus on the Meiosis cell divisions

A clip with the focus on the chiasma and independant assortment and why this is useful

A clip here to help with dihybrid crosses

Help with co-dominance, dominance and incomplete dominance

Blood types

Blood types and donations

Chromosomes

These clips are fundamental to learning genetics and underpin all of the concepts that you are expected  to know and could be examined on - Our favourite video sisters feature below (you WILL learn to love them)