Fish genetics

Question 1

What drove the major diversification of teleosts?

Answer 1

Fish specific genome duplication. It allowed for extra genes that were unconstrained by selection pressure.

Question 2

What are some examples of GMO fishes?

Answer 2

Broad spectrum resistance to diseases or temperature.
Improved yield.
Consumer products.

Question 3

What genetic marker is used for the Barcode for Life?

Answer 3

Cytochrome c oxidase I

Question 4

What are some other uses for barcoding?

Answer 4

1. Regulation and enforcement (poaching).
2. Identifying illegal species
3. Identifying mislabeled species.

Question 5

What are some uses for population genetics?

Answer 5

1. Can be used to discern partitioning between populations.
2. Identify degree of separation.
3. Stock management-Can be used to protect subpopulations from overharvesting

Question 6

How can genetics be used in conservation?

Answer 6

1. Identify distinct populations
2. Maintain genetic diversity
3. Identify hidden diversity

Question 7

Give an example of genetics being used to reconstruct the tree of life.

Answer 7

Flabby whalefishes were once thought to be three different species. DNA analysis showed that the three species were just male, female, and juvenile whalefishes.