Leaf High

Random mutation's role in the length of a giraffes neck and other animal traits?

Let say 5 million years ago the giraffes ancestor's neck was 2 inches long, then a random mutation occured that made one giraffes ancestor's neck a couple inches longer and then that individual could eat leaves higher in the branches and survive and pass on the genes. Today the giraffes neck is like 60 inches or longer, so does this mean that an additional random mutation needed to occure for each incremental increase in the giraffes neck. For example the neck was 2 inches, then 4, then 6..... and so on, with an individual random mutation responsible for each increase. Or was it just ONE initial random mutation that occured 5 million years ago and the rest of the length increase in the neck occured because of other reasons.

No, no, no. You're missing the basic point of how natural selection works.

You start with VARIATION. In all the world's population of giraffes, there are a range of neck lengths, some short, some long, most at some range in between. This does not have to be the result of mutations ... just basic variation that we see in all attributes (some of us are taller, some shorter).

If more giraffes are born than can survive, and eat the right kind of vegetation, then the taller ones may live a little longer and/or produce more offspring. This could be because a long-necked giraffe can eat from both tall and short branches, while short-necked giraffes can only eat from short branches ... so the long-necks can survive a drought better. Or it could be that female giraffes develop a preference for mates with longer necks (this is called sexual selection). Whatever the reason, those giraffes at the taller end of the range consistently do better than those at the shorter end ... so after millions of years, you have *very* tall individuals.

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2004 D NGC MS66 Wisconsin WI Quarter Extra Leaf High
2004 D NGC MS66 Wisconsin WI Quarter Extra Leaf High
$403.74
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2004d 25c wiscextra leaf high Anacs slabbed ms64
$110.00
2004 D Wisconsin Variety Set Extra High Leaf  Low Leaf NGC MS64
2004 D Wisconsin Variety Set Extra High Leaf Low Leaf NGC MS64
$395.00
2004 D Wisconsin Variety Set Extra High Leaf  Low Leaf NGC MS66
2004 D Wisconsin Variety Set Extra High Leaf Low Leaf NGC MS66
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2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER NGC MS65 VERY RARE
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2004 D WISCONSIN STATE QUARTER 914033 PCGS CERTIFIED MS63 EXTRA LEAF HIGH
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REDUCED 6 coin set 2004 D WISCONSIN QUARTER W HIGH LOW LEAF NGC MS 66
$800.00
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PCGS MS 64 Wisconsin High Low Leaf Error Quarters in New PCGS Two Coin Holder
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2004 D Wisconsin Extra Leaf High PCGS MS 63 Brilliant Uncirculated Nice Error
2004 D Wisconsin Extra Leaf High PCGS MS 63 Brilliant Uncirculated Nice Error
$179.00
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2004 D WISCONSIN EXTRA HIGH LEAF STATEHOOD 25c ERROR PCGS MS 65
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1795 S 76b Plain Edge Single Leaves One Cent High Small Clip
1795 S 76b Plain Edge Single Leaves One Cent High Small Clip
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2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS65
2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS65
$199.00
C5453 2004 D WISCONSIN EXTRA HIGH LEAF STATE QUARTER PCGS MS64
C5453 2004 D WISCONSIN EXTRA HIGH LEAF STATE QUARTER PCGS MS64
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2004 D WISCONSIN 25c EXTRA HIGH LEAF PCGS MS65 7017
2004 D WISCONSIN 25c EXTRA HIGH LEAF PCGS MS65 7017
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C7197 2004 D WISCONSIN EXTRA LEAF HIGH WASHINGTON STATE QUARTER NGC MS65
C7197 2004 D WISCONSIN EXTRA LEAF HIGH WASHINGTON STATE QUARTER NGC MS65
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RARE GORGEOUS BU MS 66 ERROR highlow extra leaf 2004 D WASHINGTON QUARTERS
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2004 D Wisconsin quarter with High Leaf Error
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2004 D Wisconsin Extra Leaf High Statehood Quarter graded NGC MS 67 Error
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1858 1C Small Letters High Leaves Flying Eagle Cent VG K1864
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2004 D WISCONSIN 25 CENTS HIGH EXTRA LEAF VARIETY ICG MS64
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2004 D Extra Leaf Low High Wisconsin State Quarter 25C NGC MS65 3 Coin Set
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C9013 2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS64
C9013 2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS64
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1817 O 106A Single Leaf PCGS VF Details Bust Half Dollar Very High End VF
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C5102 2004 D WASHINGTON STATE QUARTER WISCONSIN EXTRA LEAF HIGH NGC MS64
C5102 2004 D WASHINGTON STATE QUARTER WISCONSIN EXTRA LEAF HIGH NGC MS64
$247.50
REDUCED  1858 FLYING EAGLE CENT SL HIGH LEAVES VARIETY FS 01 1858 1901
REDUCED 1858 FLYING EAGLE CENT SL HIGH LEAVES VARIETY FS 01 1858 1901
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2004 D Wisconsin Extra Leaf High PCGS MS 65 Investment Grade BU Nice Error
2004 D Wisconsin Extra Leaf High PCGS MS 65 Investment Grade BU Nice Error
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2004 D Wisconsin Extra High  Low Leaf Quarters + 2004 D Doubled Ear Dime Rare
2004 D Wisconsin Extra High Low Leaf Quarters + 2004 D Doubled Ear Dime Rare
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2004 D WISCONSIN 25 CENTS HIGH  LOW LEAF MINT ERROR BOTH NGC MS64
2004 D WISCONSIN 25 CENTS HIGH LOW LEAF MINT ERROR BOTH NGC MS64
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2004 D WISCONSIN STATE QUARTER EXTRA LEAF HIGH NGC MS 67
2004 D WISCONSIN STATE QUARTER EXTRA LEAF HIGH NGC MS 67
$999.00
2004 D Wisconsin MS 67 ERROR high  low leaf WASHINGTON QUARTERS
2004 D Wisconsin MS 67 ERROR high low leaf WASHINGTON QUARTERS
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2 Coin Set 2004 D WISCONSIN QUARTER W HIGH and LOW LEAF PCGS 65
2 Coin Set 2004 D WISCONSIN QUARTER W HIGH and LOW LEAF PCGS 65
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2004 D Wisconsin Extra High Leaf PCGS MS 65 Label FS 5901 Error 25c LOW POPs
2004 D Wisconsin Extra High Leaf PCGS MS 65 Label FS 5901 Error 25c LOW POPs
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2004 D Wisconsin Extra Leaf High Statehood Quarter graded NGC MS 63 Error
2004 D Wisconsin Extra Leaf High Statehood Quarter graded NGC MS 63 Error
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2004 D 25C Wisconsin Extra Leaf High 50 States Quarter uncirculated MS low pop
2004 D 25C Wisconsin Extra Leaf High 50 States Quarter uncirculated MS low pop
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2004 D Wisconsin State Quarter EXTRA LEAF HIGH Variety NGC MS65 MS 65
2004 D Wisconsin State Quarter EXTRA LEAF HIGH Variety NGC MS65 MS 65
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2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH  LOW LEAF NGC MS 66
2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH LOW LEAF NGC MS 66
$349.99
2004 D WISCONSIN EXTRA HIGH LEAF STATEHOOD 25c ERROR NGC MS 67
2004 D WISCONSIN EXTRA HIGH LEAF STATEHOOD 25c ERROR NGC MS 67
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2004 D WISCONSIN 25c MULTI 3 COIN SET EXTRA HIGH  LOW LEAF  REG NGC MS 67
2004 D WISCONSIN 25c MULTI 3 COIN SET EXTRA HIGH LOW LEAF REG NGC MS 67
$2,499.99
2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH  LOW LEAF NGC MS 65
2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH LOW LEAF NGC MS 65
$299.99



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