Molecular Techniques

Question 1

What the 3 types of DNA

Answer 1

Nuclear – bi-parentally inherited
• Mitochondrial - maternally inherited
• sex chromosomes e.g. Y chromosome

Question 2

How molecular techniques be used in species identification

Answer 2

PCR specific sections of DNA e.g Common and Natterjack tadpoles
Gut contents or faecal samples to determine prey
And DNA barcoding can be used as there is a lot of variation across spp

Question 3

How can animals be aged

Answer 3

There is a methylation build up at DNA sites with age