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HORNED AND POLLED (NO HORNS) Only 2 horn genes determine if a cow will be horned or polled .

POLLED (PP). POLLED (PP). RED (rr). POLLED (PP) 100%. POLLED (PP) 50%. POLLED (P h ) 50%. BLACK (B r ) 50%. BLACK (B r ). BLACK (B r ) 50%. BLACK (BB) 100%. BLACK (B r ) 50%. BLACK (BB) 25%. BLACK (BB) 50%. BLACK (B r ). BLACK (BB). POLLED (P h ). POLLED (PP).

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HORNED AND POLLED (NO HORNS) Only 2 horn genes determine if a cow will be horned or polled .

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  1. POLLED (PP) POLLED (PP) RED (rr) POLLED (PP) 100% POLLED (PP) 50% POLLED (Ph) 50% BLACK (Br) 50% BLACK (Br) BLACK (Br) 50% BLACK (BB) 100% BLACK (Br) 50% BLACK (BB) 25% BLACK (BB) 50% BLACK (Br) BLACK (BB) POLLED (Ph) POLLED (PP) POLLED (Ph) POLLED (PP) BLACK (BB) BLACK (Br) BLACK (BB) BLACK (Br) BLACK (BB) POLLED (Ph) 100% POLLED (PP) 25% BLACK (Br) 100% POLLED (Ph) 50% HORNED (hh) 25% POLLED (Ph) HORNED (hh) RED (rr) 25% RED (rr) 100% RED (rr) 50% RED (rr) RED (rr) RED (rr) HORNED (hh) POLLED (Ph) HORNED (hh) 100% POLLED (Ph) 50% HORNED (hh) 50% HORNED (hh) HORNED (hh) GENETIC INHERITANCE – Why does a cow look (or not look) like its parents? 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 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 POLLED (PP) POLLED (PP) POLLED (PP) POLLED (PP) 100% POLLED (PP) POLLED (Ph) 100%

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