Animal Reproduction

Diploid

2 copies of gene

Haploid

1 copy of genes

Asexual Reproduction

-       Fission

-       Budding

-       Fragmentation

-       Parthenogenesis

Forty Bathing Flexible Pets

Fission

Sea anemones-a single cell or organism divides into two or more daughter cells or organisms

Budding

hydra-a new organism develops from an outgrowth or bud due to cell division at one particular site

Fregmentation

starfish-an organism breaks into two or more pieces, and each piece develops into a new, genetically identical individual - independent

Parthenogenesis

Komodo dragon-reproduction from an ovum without fertilization

Sexual reproduction

Fertilization and Gestation

Fertilization

Fusing of male and female gametes. Internal and External.

Internal Fertilization

Mammals reproduction

External Fertilization

fish, whales, frogs reproduction

Gestation

-       Oviparous

-       Viviparous

-       Ovoviviparous

Oviparous

Egg-laying (birds)

Viviparous

Fetus grows in body (humans)

Ovoviviparous

Eggs grow inside body (lizard)

Sexual determination

-       Hermaphroditism

-       External Factors

-       Chromosomes

Hermaphroditism

-       Can switch between male and female. Eg. Snail, clownfish

External Factors

turtles - temp changes

Chromosomes

X-Y, X-Z, X-0

Sexual life cycle

• Humans/animals

• Plants/algae

• Fungi

Humans/animals

Diploid> haploid.

joined egg and sperm > single egg or sperm

Plants/algae

Diploid stages equal to haploid stages.

seeds > haploid > plants > pollen > fertilization possible > Diploid

Fungi

diploid stages less than HAPLOID stages.