HH h h

Hh

H h

Pure breeding haired mouse Pure breeding hairless mouseP generation of mice

FERTILISATION

MEIOSISMEIOSIS

x

F1 generation of mice

Body cells

Reproductive cells

Fertilised egg cells = body cells

MITOSIS

hHH h

Hybrid haired mouse

Hybrid haired mouse

x

F1 generation of mice

MEIOSIS MEIOSIS

OROR

FERTILISATION

Body cells

Reproductive cells

Body cells

F2 generation of mice

H h H h

H hH h h hHH

MITOSIS