This question's due date has already passed. You may post a tutorial, but there's no guarantee that the original asker will purchase the tutorial. But other people might!

Question

$3.00 Genetics question (Weismann's hypothesis)

  • From Biology: Evolution
  • Closed, but you can still post tutorials
  • Due on Aug. 20, 2011
  • Asked on Aug. 17, 2011 at 09:41:50AM
Asked by :
omega7001
omega7001
Rating :No Rating
Questions Asked: 60
Tutorials Posted: 0
 
 
Q:

1. Propose 3 hypotheses to explain why sexyual reproduction has evolved.

2. Propose a way to test a hypothesis listed above.

For Q3 and Q4:

There is a snail that lives in New Zealand lakes that has both asexual and sexual individuals. The snails live in FW habitats and there are over a dozen worm parasites that attack them. The scientists reasoned that there might be a difference in the fitness of the asexual and sexual individuals in ponds where there were different degrees of parasitism. They found in poinds where there was a high degree of parasitism there was a much higher percentage of sexually reproducing individuals.

3. Before carrying out the experiment, why did the scientists expect there would be a difference in fitness between sexual and asexual snails in ponds with different degrees of parasitism?

4. Are the data they obtained consistent with Weismann's hypothesis? Explain your thinking.

 

3-4 sentence repsonse for each question acceptable.