MITOSIS AND ASEXUAL REPRODUCTION

MITOSIS AND ASEXUAL REPRODUCTION

WHAT ARE ALL THE LIFE PROCESSES?› H.N.T.R.S.G.E.R.M.R

WHICH ONES HAVE WE COVERED?› H.N.T.R.S.G.E.R.M

WHAT’S LEFT?› R REPRODUCTION!!

WHAT IS REPRODUCTION?

MITOSIS AND ASEXUAL REPRODUCTION

REPRODUCTION› THE PROCESS BY WHICH LIVING THINGS

PRODUCE NEW ORGANISMS OF THEIR OWN KIND

MITOSIS AND ASEXUAL REPRODUCTION

HOW DOES REPRODUCTION WORK?› REMEMBER:

ALL CELLS ARISE FROM PRE-EXISTING CELLS

› THE PROCESS BY WHICH CELLS MAKE MORE CELLS IS CALLED…

›CELL DIVISION

MITOSIS AND ASEXUAL REPRODUCTION

CELL DIVISION CAN BE BROKEN INTO TWO CATEGORIES› MITOTIC CELL DIVISION EXACT COPIES

ARE MADE› MEIOTIC CELL DIVISION NOT EXACT

COPIES ARE MADE *WE WILL DISCUSS THIS ONE FURTHER NEXT

CHAPTER*

MITOSIS AND ASEXUAL REPRODUCTION

MITOTIC CELL DIVISON› CLICK THE PIC

FOR THECELL DIVISIONSONG

MITOSIS AND ASEXUAL REPRODUCTION

MITOTIC CELL DIVISION› A.K.A. ASEXUAL REPRODUCTION

REPRODUCTION WITHOUT SEX (REQUIRING ONLY ONE PARENT CELL)

› BROKEN INTO TWO PROCESSES MITOSIS CYTOKINESIS

MITOSIS AND ASEXUAL REPRODUCTION

MITOSIS

MITOSIS AND ASEXUAL REPRODUCTION

MITOSIS› THE CONTENTS OF THE

NUCLEUS ARE COPIEDAND THEN DIVIDED TO FORM TWO IDENTICALNUCLEI

› WHY IS THIS SO IMPORTANT? IN OTHER WORDS, WHY DOES THIS NEED TO HAPPEN?(*HINT – WHAT’S IN THE NUCLEUS?)

MITOSIS AND ASEXUAL REPRODUCTION

MITOSIS› LET’S BREAK

DOWN THESTAGES OFMITOSIS

› CLICK THEIMAGE FOR AVIDEO

MITOSIS AND ASEXUAL REPRODUCTION

CYTOKINESIS› THE CYTOPLASM (CELL) DIVIDES IN TWO

MITOSIS AND ASEXUAL REPRODUCTION

CYTOKINESIS› IN ANIMAL CELLS

CLEAVAGE FURROW› IN PLANT CELLS

CELL PLATE FORMATION WHY IS THERE A DIFFERENCE WITH

CYTOKINESIS AND NOT WITH MITOSIS?

MITOSIS AND ASEXUAL REPRODUCTION

SHOULD MITOTIC CELL DIVISION HAPPEN ALL THE TIME? WHY OR WHY NOT?

SHOULD MITOTIC CELL DIVISION HAPPEN AT THE SAME RATE ALL THE TIME? WHY OR WHY NOT?

WHAT DO WE CALL MECHANISMS THAT CAN CHANGE THE RATE OF A REACTION?(*HINT WHAT CONTROLS INSULIN PRODUCTION?

MITOSIS AND ASEXUAL REPRODUCTION

WHAT’S A CONSEQUENCE OF MITOTIC CELL DIVISION HAPPENING UNCONTROLLABLY?

CANCER

MITOSIS AND ASEXUAL REPRODUCTION

DON’T WORRY…NORMALLY A SPECIAL PROTEIN CALLED CYCLIN EXISTS THAT CONTROLS WHEN CELLS DIVIDE, SO THE “C” WORD IS KEPT IN CHECK

MITOSIS AND ASEXUAL REPRODUCTION

MITOTIC CELL DIVISION AS A FORM OF REPRODUCTION› ASEXUAL ONLY› PRODUCES “IDENTICAL” OFFSPRING

FORMS OF ASEXUAL REPRODUCTION› BINARY FISSION› BUDDING› SPORE FORMATION› REGENERATION› VEGETATIVE REPRODUCTION (PROPAGATION)

MITOSIS AND ASEXUAL REPRODUCTION

BINARY FISSION

BUDDING

SPORE FORMATION

REGENERATION

VEGETATIVE PROPAGATION

MITOSIS AND ASEXUAL REPRODUCTION

THAT’S MITOTIC CELL DIVISION…BUT WHAT IF YOU DON’T WANT AN “IDENTICAL” OFFSPRING?

PRESENTING MEIOTIC CELL DIVISION…COMING NEXT CHAPTER