g10 reproduction

Grade 10

Biology

International School of

Tanganyika

Mr Kremer

Reproduction: Key concepts

• Asexual + sexual reproduction + examples

• Mitosis + IPMAT

• Meiosis + IPMAT x2

• Sources of genetic variation

Mitosis

Mitosis + the Cell CycleInterphaseProphase

MetaphaseAnaphaseTelophase

Cytokinesis

Meiosis

Meiosis + Variation

Interphase as normal 2 divisions

Crossing overHaploid gametesRecombination

Meiosis + Variation

Prophase 1

Crossing over

Meiosis + Variation

Metaphase 1

Meiosis + Variation

Anaphase 1

Meiosis + Variation

Telophase 1

(sometimes followed by interphase,

but not always)

Meiosis + Variation

Prophase 2

NO crossing over!

Meiosis + Variation

Metaphase 2

Meiosis + Variation

Anaphase 2

Meiosis + Variation

Telophase 2

Produces 4 haploid gametes

Mitosis vs Meiosis

Mitosis Meiosis

•single division

•brief prophase - no

crossing over

•produces 2 diploid

daughter cells

•diploid daughter cells

genetically same as parent

cell

•2 division processes

•lengthy prophase includes

crossing over - more

variation

•produces 4 haploid

gametes

•gametes not genetically

identical to parent cell

Sources of Variation


MutationRecombinationCrossing Over

Image: www.beltina.org


MutationRecombinationCrossing Over

g10 reproduction

Education