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Chpt4 reproduction
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Chpt4 reproduction

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Chpt4 reproduction Chpt4 reproduction Presentation Transcript

  • Organisms have to reproduce (makebabies) so their species can survive.
  • If a species stopped reproducing , it would eventually go extinct.
  • Definition:There are of reproduction: reproduction reproduction.
  • Same Samegenes genes
  • asexual reproduction: only one parent;offspring genetically identical to parent Examples of asexual reproduction
  • asexual reproduction: only one parent;offspring genetically identical to parent Example of asexual reproduction
  • The of asexual reproduction is that it is . Example of asexual reproduction
  • The of asexual reproduction ithat there is in offspring are .
  • The following are two MOREexamples of asexual reproduction:
  • asexual reproduction: only one parent;offspring genetically identical to parent Example of asexual reproduction
  • Cloning is a type of asexual reproduction. Cloning produces a new individual genetically identical to the parent
  • In the 1990’s a sheep named Dolly was successfully cloned
  • sexual reproduction: A. the a B. the C. The two D. The over a 9 month period (in humans) E. The .
  • Now answer #1- 20
  • :
  • Mitosis is why damaged body parts heal!
  • Now answer # 21- 31
  • .
  • Now answer # 32- 39.
  • Word!We’re some cool cats!
  • Now answer # 40-43.
  • Fertilization:
  • (sperm or eggs) 46 is thechromosome number for humans
  • : all
  • fertilization (the uniting of the gametes) creates a unique offspring.
  • The offspring gets half of its genes fromeach parent but it is a unique individual.
  • Advantages and disadvantages of meiosis (sexual reproduction)
  • Advantages:• Creates a great deal of variations in species.• The variations help a species to survive.• The variations can lead to natural selection and evolution.
  • ZygoteFormation, Growthand Differentiation:
  • The following is how multi-cellular organisms reproduce:
  • sperm and eggcombine, results in a zygote (a fertilized egg).
  • (a fertilized egg) has 46 chromosomes (for humans). Azygote
  • The zygote undergoes acalled . The cells divide and divideand divide and divide….without growing in size.
  • from steps A to E, the cells are . None of the cells have aspecialized function. At steps F and G begins.
  • whe n the cells become . The cells changebecoming the body parts of the embryo.
  • after the cells havebecoming the body parts of the embryo. The embryo grows until the baby is born.
  • This shows . Byday 56, the embryo is fully-formed, it just has to grow to full term.
  • are the (1st three months)of pregnancy ..
  • A development question like this may be on the regents
  • You must know the steps of development for the regents!
  • You must know the steps ofdevelopment for the regents!
  • Now answer #44-61
  • HumanReproduction andDevelopment
  • You must know the humanreproductive systems and what each part does for the regents….
  • For the male reproductive system: you onlyneed to know that organ “X” is . The testes .
  • The female reproductive system ismore complicated than the male’s
  • You have know a lot more….
  • A: (ova) .
  • B: (oviduct)
  • C: .
  • A different picture of female reproductive system. Fallopian tube uterus
  • A Woman’s 28 day menstrual cycle is regulatedby hormones
  • You must know that the (growing baby).
  • A: is the . The .
  • are from the baby .
  • 1: birth canal
  • 2: umbilical cord
  • 3: placenta
  • 4: fallopian tube (oviduct)
  • 5: fluid sac
  • Summary:You must know the steps of reproduction for the regents.
  • What process is steps 1 ?
  • What process is steps 1 ?Meiosis (aka Oogenesis)
  • What process is step 2?
  • What process is step 2?Meiosis (spermatogenesis)_
  • What process is step 3?
  • What process is step 3? fertilization
  • What process is step 4?
  • What process is step 4? differentiation
  • What process is step 5?
  • What process is step 5? growth
  • Now answer # 87- 97