b. _____________

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B. _____________ Chromosomes are made of sections of DNA called genes. Genes are always in pairs. Each chromosom e has many gene pairs. Cell with chromosomes inside the nucleus

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Chromosomes are made of sections of DNA called genes. B. _____________. Genes are always in pairs. Each chromosome has many gene pairs. Cell with chromosomes inside the nucleus. DNA. sugars. nitrogen bases. Purposes of Cell Division. fold. Purposes of in Humans. Cel l. D i v - PowerPoint PPT Presentation

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Page 1: B. _____________

B. _____________

Chromosomes are made of sections of

DNA called genes.

Genes are always in pairs.

Each chromosome has many gene pairs.

Cell with chromosomes inside

the nucleus

Page 2: B. _____________

DNAsugars

nitrogen bases

Page 3: B. _____________

Purposes of Cell Division

Page 4: B. _____________

Purposes of in HumansCell

Division

fold

cut

Page 5: B. _____________

Purpose: Cell division for reproduction creates offspring with traits from both mother and father.

Called: MEIOSISmakes

Page 6: B. _____________

MOM DAD

egg sperm

offspring

(reproduction)

X X

X X

X X

X X

/ /

/ /

/ /

/ /

\ \

\ \

/ /

/ /

Page 7: B. _____________

Purpose: Cell division for growth and repair creates exact copies of a cell.

Called: MITOSIS

“My toe-sies”

Page 8: B. _____________

X X

X X

X X

X X

Skin

Cell

Skin

Cell

exact copy

(growth & repair)

Page 9: B. _____________

Quick Quiz:

1.Meiosis makes _____.

2.The purpose of meiosis is ______________.

3.Meiosis create egg and sperm cells with _____ the original chromosomes.

4.Egg and Sperm combine to create an __________ with unique traits.

5.Mitosis can be compared to a ______________.

6.Mitosis makes exact ______ of the original cell.

7.The purpose of mitosis is ________ and _______ of organisms.

me

reproduction

half

offspring

copy machine

copy

growth repair