types of reproduction asexual vs sexual. let’s do some...
TRANSCRIPT
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. _____