Title: Reproduction in living organisms
1Reproduction in living organisms
- (other organisms not you)
(that topic is covered in health class)
2Asexual reproduction
- 1 parent
- Offspring genetically identical to parent
3Asexual reproduction
- Examples binary fission (bacteria),
fragmentation (protists), budding (fungi),
vegetative reproduction (plants)
ALL variations on mitosis
4Sexual reproduction
- 2 parents
- Offspring inherit ½ from dad, ½ from mom
- Meiosis generates gametes, also generates genetic
variety in offspring
5Human life cycle
Multicellular diploid organism(2n)
mitosis
meiosis
Unicellulardiploid zygote(2n)
Unicellular haploid cells(gametes)(n)
fertilization
Meiosis splitting chromosome pairs 2n ?
nMitosis making exact copy
6Protists / fungi / plants
Multicellular diploid organism(2n)
sporophyte
mitosis
meiosis
Unicellular diploid zygote(2n)
Unicellular haploid cells(n)
(spores)
fertilization
Unicellularhaploid gametes(n)
mitosis
Multicellularhaploid organism(n)
gametophyte
mitosis
7Human life cycle
Multicellular diploid organism(2n)
mitosis
meiosis
Unicellulardiploid zygote(2n)
Unicellular haploid cells(gametes)(n)
fertilization
8Protists / fungi / plants
Multicellular diploid organism(2n)
mitosis
meiosis
Unicellular diploid zygote(2n)
Unicellular haploid cells(n)
(spores)
fertilization
Unicellularhaploid gametes(n)
mitosis
Multicellularhaploid organism(n)
mitosis
9Moss(nonvascular plants)
sporophyte
gametophyte
gametophyte dominates
10Ferns(seedless vascular plants)
sporophyte
sporophyte dominates
11Pine treeGymnosperms
tiny gametophyte inside cone
sporophyte
sporophyte dominates
12SunflowerAngiosperms
tiny gametophyte inside bottom of flower
rest of plant sporophyte
sporophyte dominates