TYPES OF REPRODUCTIONTYPES OF REPRODUCTION

ASEXUAL VS SEXUALASEXUAL VS SEXUAL

Let’s do some comparing!

Prokaryote/Eukaryote?Prokaryote/Eukaryote?

Unicellular/Multicellular?Unicellular/Multicellular?

Heterotroph/Autotroph?Heterotroph/Autotroph?

Asexual/Sexual?Asexual/Sexual?

Eukaryote, Multicellular, Heterotroph, Sexual

Eukaryote, Unicellular, Heterotroph, Asexual

Let’s do some comparing!

Prokaryote/Eukaryote?Prokaryote/Eukaryote?

Unicellular/Multicellular?Unicellular/Multicellular?

Heterotroph/Autotroph?Heterotroph/Autotroph?

Asexual/Sexual?Asexual/Sexual?

Eukaryote, Multicellular, Autotroph, Sexual

Eukaryote, Multicellular, Heterotroph, Sexual

PRE-TEST: PRE-TEST: TRUE OR TRUE OR FALSE?FALSE?1. Cells in the bodies of multicelled creatures, such

as humans, are reproduced in a way that is verysimilar to the method used by most protozoa. _____2. All human cells have two complete sets of

chromosomes. _____3. In biology, fertilization is when one cell divides

into two cells. _____4. Inside of cells, nearly all the genes are located on

special structures known as microtubules. _____5. Cell growth takes place during the stage of a

cell's life cycle known as interphase. _____

ASEXUAL REPRODUCTIONASEXUAL REPRODUCTION

•All genetic information from 1 parent–Therefore, have same DNA as parent

•Results in clones (genetically identical orgs.)

TYPES OF ASEXUAL TYPES OF ASEXUAL REPRODUCTIONREPRODUCTION•BINARY FISSION

–Cell simply divides in half

–DNA copies itself and then cell divides

–results in 2 genetically identical cells•EX: Bacteria, Protists

TYPES OF ASEXUAL TYPES OF ASEXUAL REPRODUCTIONREPRODUCTION•BUDDING

–NUCLEUS (CONTAINING DNA) DIVIDES EQUALLY

–CYTOPLASM DOES NOT

–THEREFORE, RESULTS IN “BUDS”•EX: YEAST, HYDRA

TYPES OF ASEXUAL TYPES OF ASEXUAL REPRODUCTIONREPRODUCTION•SPORULATION

–“SPORE FORMATION”–SPECIALIZED SINGLE CELLS COMING FROM ONE PARENT•EX: OCCURS IN MOLD AND OTHER FUNGI

SEXUAL REPRODUCTIONSEXUAL REPRODUCTION• TWO PARENTS• HALF (1/2) GENETIC INFO FROM

EACH PARENT– THEREFORE, OFFSPRING

GENETICALLY DIFFERENT FROM PARENTS •GENETIC VARIATION!!!!!

– SHARE SOME SIMILARITIES• GAMETES (SEX CELLS) EACH CARRY

A HALF OF THE INFO

SEXUAL REPRODUCTIONSEXUAL REPRODUCTION

•FERTILIZATION:–THE JOINING OF SEX CELLS

½ genetic (egg) + ½ genetic (sperm) = 1 genetically whole organism

POST QUIZ: POST QUIZ: TRUE OR TRUE OR FALSE?FALSE?1. Diploid cells have two full sets of

chromosomes. _____2. DNA replication takes place during the

metaphase stage of mitosis. _____3. Chromosomes are not visible during

most of a cell's life cycle. _____4. Asexual reproduction requires only one

parent. _____5. Meiosis does not occur in most types

of cells. _____