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 WISCONSIN 25 CENTS HIGH EXTRA LEAF VARIETY ICG MS63
2004 D WISCONSIN 25 CENTS HIGH EXTRA LEAF VARIETY ICG MS63
$52.88
2004 D WI Extra Leaf High 25C PCGS MS64
2004 D WI Extra Leaf High 25C PCGS MS64
$200.00
2004 D NGC MS66 Wisconsin WI Quarter Extra Leaf High
2004 D NGC MS66 Wisconsin WI Quarter Extra Leaf High
$403.74
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
Set of 2004D Wisconsin Extra Leaf High Low Uncirculated Error Quarters Pair
Set of 2004D Wisconsin Extra Leaf High Low Uncirculated Error Quarters Pair
$179.00
Ms68 Pr70 Proof Wisconsin Extra Leaf High Low NGC ms 6 coin error set 2004
Ms68 Pr70 Proof Wisconsin Extra Leaf High Low NGC ms 6 coin error set 2004
$17,000.00
2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS64
2004 D WISCONSIN EXTRA LEAF HIGH STATE QUARTER PCGS MS64
$125.00
2004 D WISCONSIN STATE QUARTER 914033 PCGS CERTIFIED MS63 EXTRA LEAF HIGH
2004 D WISCONSIN STATE QUARTER 914033 PCGS CERTIFIED MS63 EXTRA LEAF HIGH
$190.00
2004 D WISCONSIN 25 CENTS HIGH EXTRA LEAF VARIETY ICG MS65
2004 D WISCONSIN 25 CENTS HIGH EXTRA LEAF VARIETY ICG MS65
$76.00
PCGS MS 64 Wisconsin High Low Leaf Error Quarters in New PCGS Two Coin Holder
PCGS MS 64 Wisconsin High Low Leaf Error Quarters in New PCGS Two Coin Holder
$475.00
2004 D WISCONSIN STATEHOOD QUARTER EXTRA LEAF HIGH ANACS SLABBED AU55
2004 D WISCONSIN STATEHOOD QUARTER EXTRA LEAF HIGH ANACS SLABBED AU55
$16.50
2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH  LOW LEAF NGC MS 63
2004 D WISCONSIN 25c 2 COIN VARIETY MATCHED SET EXTRA HIGH LOW LEAF NGC MS 63
$99.99
C5453 2004 D WISCONSIN EXTRA HIGH LEAF STATE QUARTER PCGS MS64
C5453 2004 D WISCONSIN EXTRA HIGH LEAF STATE QUARTER PCGS MS64
$275.00
C7197 2004 D WISCONSIN EXTRA LEAF HIGH WASHINGTON STATE QUARTER NGC MS65
C7197 2004 D WISCONSIN EXTRA LEAF HIGH WASHINGTON STATE QUARTER NGC MS65
$350.00
1795 Flowing Hair Dollar Scarce 2 Leaves Highly Collectible RARE Key Date
1795 Flowing Hair Dollar Scarce 2 Leaves Highly Collectible RARE Key Date
$9.95
2004 D Extra Leaf Low  High Wisconsin State Quarter 25C NGC MS65 3 Coin Set
2004 D Extra Leaf Low High Wisconsin State Quarter 25C NGC MS65 3 Coin Set
$399.99
1817 O 106A Single Leaf PCGS VF Details Bust Half Dollar Very High End VF
1817 O 106A Single Leaf PCGS VF Details Bust Half Dollar Very High End VF
$300.00
2004 D NGC MS65PL Prooflike Wisconsin WI Quarter Extra Leaf High
2004 D NGC MS65PL Prooflike Wisconsin WI Quarter Extra Leaf High
$308.74
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
$99.00
C5102 2004 D WASHINGTON STATE QUARTER WISCONSIN EXTRA LEAF HIGH NGC MS64
C5102 2004 D WASHINGTON STATE QUARTER WISCONSIN EXTRA LEAF HIGH NGC MS64
$275.00
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
$265.00
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
$305.00
2004 D WISC Washington Quarter EXTRA LEAF HIGH LOW RAREUS Error Coin
2004 D WISC Washington Quarter EXTRA LEAF HIGH LOW RAREUS Error Coin
$300.00
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
$215.00
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
$350.00
2004 Wisconsin quarter with High Leaf Error
2004 Wisconsin quarter with High Leaf Error
$116.99
2004 D WISCONSIN STATE QUARTER EXTRA LEAF HIGH NGC MS 67
2004 D WISCONSIN STATE QUARTER EXTRA LEAF HIGH NGC MS 67
$999.00
REDUCED  6 coin set 2004 D WISCONSIN QUARTER W HIGH LOW LEAF NGC MS 66
REDUCED 6 coin set 2004 D WISCONSIN QUARTER W HIGH LOW LEAF NGC MS 66
$999.00
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
$475.00
2004 D Wisconsin MS 67 ERROR high  low leaf WASHINGTON QUARTERS
2004 D Wisconsin MS 67 ERROR high low leaf WASHINGTON QUARTERS
$1,900.00
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
$295.00
2004 D Wisconsin Extra Leaf High and Low Quarters Graded ANACS MS 67 Error Set
2004 D Wisconsin Extra Leaf High and Low Quarters Graded ANACS MS 67 Error Set
$1,985.00
2004 D WISCONSIN QUARTER HIGH LEAF NGC MS68 FINEST ONLY ONE IN 10 YEARS
2004 D WISCONSIN QUARTER HIGH LEAF NGC MS68 FINEST ONLY ONE IN 10 YEARS
$10,312.50
RARE GORGEOUS BU MS 66 ERROR highlow extra leaf 2004 D WASHINGTON QUARTERS
RARE GORGEOUS BU MS 66 ERROR highlow extra leaf 2004 D WASHINGTON QUARTERS
$427.95
1858 Flying Eagle Cent G Good Large Letters High Leaf Closed 3
1858 Flying Eagle Cent G Good Large Letters High Leaf Closed 3
$30.00
2004 D Wisconsin Extra Leaf High  Low Set NGC MS 64
2004 D Wisconsin Extra Leaf High Low Set NGC MS 64
$389.00
2004 D 25C Wisconsin Quarter Extra Leaf Set Regular High Low 3 Coins
2004 D 25C Wisconsin Quarter Extra Leaf Set Regular High Low 3 Coins
$429.99
2004 D Wisconsin Extra Leaf High Low Normal Quarters In NGC Trio Set Holder
2004 D Wisconsin Extra Leaf High Low Normal Quarters In NGC Trio Set Holder
$375.00
2004 D WISCONSIN QUARTER HIGH LEAF PCGS MAC MS 66 PQ 2ND FINEST SPOTLESS 558
2004 D WISCONSIN QUARTER HIGH LEAF PCGS MAC MS 66 PQ 2ND FINEST SPOTLESS 558
$576.75
2004 D WISCONSIN QUARTER HIGH LEAF PCGS MAC MS 66 PQ 2ND FINEST SPOTLESS 115
2004 D WISCONSIN QUARTER HIGH LEAF PCGS MAC MS 66 PQ 2ND FINEST SPOTLESS 115
$636.75



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