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Zo Reproductive Strategies

Reproductive Strategies

p. 134, 140

Hermaphroditism

         Monoecious

?          ______________________________________________________________________________________

       ______________________________________________________________________________________

         Dioecious

?          ______________________________________________________________________________________

       ______________________________________________________________________________________

         Most hermaphrodites ____________________________________________________________.

?          Even though they produce both germ cells, they still exchange them with a member of the same species.

         Hermaphroditic species can potentially produce ___________________ as many offspring.

         Sequential hermaphrodites

?          have a genetically programmed _____________________________________ during their life

Parthenogenesis

         The development of an embryo from an __________________________________________ or one in which the male and female nuclei fail to ______________________ following fertilization

         Ameiotic parthenogenesis

?          ________________________________________________________________________

?          ________________________________________________________________________

?          ________________________________________________________________________

?          ________________________________________________________________________

         Meiotic parthenogenesis

?          ________________________________________________________________________

?          ________________________________________________________________________

         _________________________________________________________________

?          Diploid condition restored by ________________________________________________ or by autogamy

         Autogamy – _______________________________________________________

____________________________________________________________________

         Haplodiploidy

?          Ex: honey bees

         Queen bee can fertilize eggs as she lays them, or allow them to remain unfertilized.

         Fertilized eggs become ______________________________ females (queens or workers)

         Unfertilized eggs develop parthenogenically to become ____________________________ males (drone)

Oviparous

         Animals who ____________________________________________

         Fertilization may be internal or external

?          Internal fertilization

         Eggs are fertilized inside the body of a female _________________________ she lays them

?          External fertilization

         Eggs are fertilized by a male _____________________________  a female lays them

Ovoviviparous

         Some animals ______________________________ eggs in their body while they develop

         Embryos derive all their __________________________________________ from yolk stored inside the egg

         Occurs in several _________________________________ groups and certain _______________ and __________________________

Viviparous

         Eggs develop in the ____________________________ or ___________________________ with embryos deriving their nourishment directly from the ________________________________

         Confined mostly to ____________________________ and ______________________________ fishes

?          Few invertebrates, amphibians and reptiles known

 
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