HORNED AND POLLED NO HORNS - PowerPoint PPT Presentation

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HORNED AND POLLED NO HORNS

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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) ... – PowerPoint PPT presentation

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Title: 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
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