Meiosisand

Genetic Diversity

B b

A

C

a

c

Crossing Over

B b

A

C

a

c

AB

C

a

c

b

Crossing Over

B b

A

C

a

c

AB

C

a

c

b

Crossing Over

B b

C c

AB

C

a

c

bAa

Crossing Over

AB

C

B

C

a a

c

b

c

bA

Crossing Over

AB

C

B

C

a a

c

b

c

bA

Crossing Over

AB

C

B

C

a a

c

b

c

bA

Crossing Over

AB

C

B

C

a a

c

b

c

bA

Crossing Over

AB

C

B

C

a a

c

b

c

bA

Random Fertilization

AB

C

B

C

aa

c

b

c

bA

Random Fertilization

AB

C

B

C

a

c

bA a

c

b

Random Fertilization

AB

C

C c c

AB

C

c

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

AB

C

a

c

b

ZYGOTE!

AB

C

a

c

b

ZYGOTE!c

AB

C

a

c

b

Other ZYGOTES?

Cc

c

AB

C

a

c

b

Other ZYGOTES?

Cc

c

a

c

b

AB

C

a

c

b

Other ZYGOTES?

Cc

b

c

a

c

b

a

c

b

AB

C

a

c

b

Other ZYGOTES?

Cc

b

c

a

c

b a

c

b

a

c

b

AB

C

a

c

b

Other ZYGOTES? B

C

a

c

bA

a

c

b

a

c

b a

c

b

a

c

b

AB

C

a

c

b

Other ZYGOTES?

B

C

a

c

bA

a

c

b

a

c

b

a

c

b

a

c

b

AB

C

a

c

b

Other ZYGOTES?

B

C

a

c

bA

a

c

b

a

c

b

a

c

b

a

c

b

AB

C

a

c

b

4 possible ZYGOTES!

B

C

a

c

bA

a

c

b

a

c

b

a

c

b

a

c

b

AB

C

a

c

b

a

c

bB

C

a

a

c

ba

c

ba

c

b

c

bA

AB

C

B

C

a a

c

b

c

bA

dd D D

Metaphase I

Independent Assortment

AB

C

B

C

a a

c

b

c

bA

dd D D

Anaphase I

AB

C

B

C

a a

c

b

c

bA

dd D D

Anaphase II

AB

C

B

C

a a

c

b

c

bA

dd DD

AB

C

B

C

aa

c

b

c

bA

d

d DD

AB

C

B

C

a a

c

b

c

bAdd

D

D

AB

C

B

C

a a

c

b

c

bAdd

D

D

AB

C

d B

C

ad

c

bA

D

a

c

bD

AB

C

B

C

a a

c

b

c

bA

dd DD

AB

C

B

C

a a

c

b

c

bA

ddD D

Metaphase I

AB

C

B

C

a a

c

b

c

bA

ddD D

Anaphase I

AB

C

B

C

a a

c

b

c

bA

ddD D

Anaphase II

AB

C

B

C

aa

c

b

c

bA

dDD

d

AB

C

B

C

aa

c

b

c

bA

dD

Dd

AB

C

B

C

a a

c

b

c

bAd

DD d

AB

C

B

C

a a

c

b

c

bAd

DD d

AB

C

B

C

a a

c

b

c

bA

ddDD

AB

C

B

C

a a

c

b

c

bAd

DD d

AB

C

B

C

a a

c

b

c

bA

ddDD

AB

C

d B

C

ad

c

bA

D

a

c

bD

AB

C

B

C

a a

c

b

c

bA

dd DD