What causes sexual dimorphism? Give some examples of sexually dimorphic species, and why you think that form of sexual dimorphism arose.

What are the four biological events associated with sexual reproduction that contribute to the diversity of a gene pool?

How could changes in the environment affect populations of species with temperature-dependent sex determination?

You want to cultivate truffles for cooking. What is the problem with cultivating a species that only has an asexual lifecycle, assuming genetic variation is not a concern (explain your answer)?

Scientists studying reproduction compared three closely related species of bagworm moths. The reproductive methods for these species are given in the table. Which of the following research questions would provide additional information about the population level impacts of meiosis and sexual reproduction? A - How do the number of D. charlottae offspring compare with the number of S. rupicolella offspring? B - Do D. charlottae and S. rupicolella populations express greater genetic diversity than D. fennicella populations? C - Are the offspring of D. fennicella genetically unique compared to the offspring of D. charlottae and S. rupicolella? D - Does crossing-over in D. fennicella result in increased genetic variation compared to D. charlottae and S. rupicolella?

What is the importance of genetic variation that is seen as a result of processes such as crossing over and random fertilization that take place within mitosis/meiosis? What purpose do they serve for the survival of a species?

Using this information, how do I figure out the answer to question1?    INTRODUCTION In most species of Drosophila, a female mating with a single male usually supplies sufficient sperm to fertilize her lifetime supply of eggs. Moreover, mating is often costly to female flies. So why do females of some species mate more than once? Perhaps they do this to assess the quality of males and/or the sperm males produce via sperm competition. Tom Price, Nina Wedell, and their colleagues at the University of Exeter provide evidence for the sperm competition hypothesis. They show multiple mating increases in frequency when a selfish genetic element that reduces sperm quality is prevalent. In Drosophila, females are XX and males are XY. They normally occur in equal numbers. In D. pseudoobscura, males that harbor the X-linked selfish genetic element sex ratio (SR) have produced nearly all female progeny, as SR sabotages Y-bearing sperm. The SR element gains a tremendous transmission advantage but…

what is alternation of generations and could it be a good evolutionary strategy for some organisms

different sexes can be confirmed by studying living species. How could you look for evidence of sexual dimorphism in the fossil record? How could you distinguish this from ontogenetic differences (i.e. juveniles vs. adults)?

The most notable differences between gamete formation in most animals and gamete formation in plants is that ______________.      a) plants produce gametes in somatic tissue, whereas animals produce gametes in germ tissue   b) plants produce gametes by mitosis, whereas animals produce gametes by meiosis   c) plants produce only one of each gamete, but animals produce many gametes   d) plants produce gametes that are diploid, but animals produce gametes that are haploid