« previous next »

Author Question: The loss of ventral spines by modern freshwater sticklebacks is due to natural s (Read 716 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 12, 2013
The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic effects of Pitx1 gene
A) duplication (gain in number).
B) elimination (loss).
C) mutation (change).
D) silencing (loss of expression).


Millan

  • Sr. Member
  • ****
  • Posts: 368
Reply #1 on: Jul 13, 2013
I know it's D, we did this last week ;)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

penguins

  • Hero Member
  • *****
  • Posts: 903
Reply #2 on: Jul 18, 2013
Thank you, thank you!!


« previous next »
 

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Dentition, as illustrated in Knight's Sketches in Natural History Dentition, as illustrated in Knight's Sketches in Natural History
National Freshwater Fishing Hall of Fame National Freshwater Fishing Hall of Fame
Modern Human Fossil Sites in the Old World Modern Human Fossil Sites in the Old World
When a Tornado Strikes: Social Organization Following a Natural Disaster When a Tornado Strikes: Social Organization Following a Natural Disaster
When a Tornado Strikes: Social Organization Following a Natural Disaster When a Tornado Strikes: Social Organization Following a Natural Disaster
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree? How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?
Video: Green alga life cycle Animation

For a complete list of videos, visit our video library