10.4 investigating genetic diversity

Question 1

what are polygenic traits?

Answer 1

traits controlled by 1+ gene

Question 2

what are the problems with observing traits?

Answer 2

• no discrete differences
• could be modified by environment (eg. weight, height, age)

Question 3

how is genetic diversity observed by DNA sequencing?

Answer 3

• monoclonal antibodies with fluorscent tag binds to a complementary base
• analysed by machine

Question 4

how does DNA sequencing track evolution?

Answer 4

close relatives have similar DNA base sequences

Question 5

why is observing genetic diversity by mRNA base sequences easier?

Answer 5

due to transcription -> no introns / junk DNA