nextnicelove
New member
Robert Vroenhoek's studies of fish with coexisting sexual and asexual species were an attempt to answer the question Why do so many organisms reproduce asexually when it is so costly? He found that the Black Spot pathogen affects about 40 % of asexual fish, but almost none of the sexually reproducing fish were infected. Then after twenty seasons of seeing higher rates of infection in the sexual fish as severe drought reduced the fish populations and he found a lot of sexually reproduced fish were infected, but few asexual fish were infected. They hypothesized that the sexually reproducing fish were now infected, because the populations had crashed during the drought leaving little genetic variation in the sexual population.
They tested their hypothesis by
a. collecting DNA and checking for allelic variation
b. collecting mt DNA and checking for haplotype variation
c. introducing sexually reproducing fish from a population which had escaped the drought.
d. hybridizing the sexual and asexual populations.
e. removing all the asexually reproducing fish
They tested their hypothesis by
a. collecting DNA and checking for allelic variation
b. collecting mt DNA and checking for haplotype variation
c. introducing sexually reproducing fish from a population which had escaped the drought.
d. hybridizing the sexual and asexual populations.
e. removing all the asexually reproducing fish