HORNED AND POLLED NO HORNS

1
GENETIC INHERITANCE Why does a cow look (or not
look) like its parents?

• HORNED AND POLLED (NO HORNS)
• Only 2 horn genes determine if a cow will be
  horned or polled.
• The polled gene (P) is dominant over the horned
  gene (h).
• Any animal with a polled gene (P) will be polled.
• Only animals with 2 horned genes (hh) genes will
  be horned.
• POSSIBLE COMBINATIONS

• RED AND BLACK COAT COLORS
• Only 2 color genes determine if a cow will be red
  or black.
• The black gene (B) is dominant over the red gene
  (r).
• Any animal with a black gene (B) will be black.
• Only animals with 2 red genes (rr) genes will be
  red.
• POSSIBLE COMBINATIONS

POLLED (PP)
POLLED (PP)
POLLED (PP)
POLLED (PP) 100
POLLED (PP)
POLLED (Ph) 100