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Reproductio

NAU bio182 animal reproduction

QuestionAnswer
3 types of asexual reproduction budding, parthenogenesis, and regeneration.
Budding produces new individuals that form from the bodies of older animals by mitotic division. Results in a genetically identical structure, physically attached to the parent.
regeneration- can replace damaged tissue or may form a complete individual. It's the regrowth of structures. (echinoderms)
parthenogenesis development of offspring from unfertilized eggs. (bees- fertilized egg is female worker. Unfertilized egg is male drone)
Whiptail lizard reproduces by parthenogenesis. female acts as male during courtship and mating. No sperm is produced or transfered.
Parthenogenesis in whiptail lizard when progesterone peaks-acts as male. When estrogen level is high- acts as female.
Temp sex determination in turtles colder temps- most likely to be male.
Temp sex determination in Jacky lizards (Amphibolurus muricatus) male at intermediate temperatures. Female at high or low temp.
Temp sex determination in aligators Male at high temp. Female at low temp.
Protandry all born male. (clown fish)
protogyny all born female (rainbow wrasses) two male phases
Bacterium Wolbachia affect sex determination in some arthropods by Preventing mating 2 strains infected w/ 2 species of Wolbachia. Some species cannot reproduce without bacterium.
How many sex chromosomes are in a platypus? 10
Oviparous Animals lay eggs in environment and embryos develop outside mothers body (insects, reptiles, birds, protherian mammals)
Ovoviviparous Young hatch inside mothers and are born live (western diamondback rattlesnake, sea horse)
Viviparparous live birth. embryo develops within mother.(placental mammals. walrus. All mammals except protherian)
Created by: maw247
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