MIHS Sample for Inheritance and Tendency

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WHAT IS IT?

smaples of how to create heritable variation and to use a slider to set a "tendency" for behavior.

HOW IT WORKS

inheritance: uses "hatch" and " of myself" to pass on a trait to offspring (+/- random #). tendency: uses slider to set the "tendency", then an "ifelse tendency < 0" to choose between different behaviors

HOW TO USE IT

Click 'setup' to create some kings. Click 'go' to get one random king to "hatch" an offspring that will tend to be either bigger or smaller, depending on the value of "size-preference". Every time you click 'go', one more king will hatch. Use the "size-preference" slider to change the tendency for the kings to grow larger or smaller.

THINGS TO NOTICE

Kings inherit the size of their parent, plus or minus a random amount. Changing the "size-preference" slider makes it more likely for kings to get bigger or smaller.

THINGS TO TRY

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EXTENDING THE MODEL

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NETLOGO FEATURES

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RELATED MODELS

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Click to Run Model

to setup                 ;; create 10 gray kings of size 5
  clear-all
  ask patches [set pcolor white]
  create-turtles 10 [set shape "chess king" set size 5 set color gray fd random 5]
end 

to go                    ;; hatch a new king that inherits its parent's size, plus or minus a random amount
  
  if size-preference < 0 ;; new kings will be smaller than parent
    [ask one-of turtles [hatch 1 [set size [size] of myself + random (size-preference - 1) set color random 390 fd random 3 + 1]]]
    
  if size-preference = 0 ;; new kings will be the same size as parent
    [ask one-of turtles [hatch 1 [set size [size] of myself set color random 390 fd random 3 + 1]]]
    
  if size-preference > 0 ;; new kings will be larger than parent
    [ask one-of turtles [hatch 1 [set size [size] of myself + random (size-preference + 1) set color random 390 fd random 3 + 1]]]
end

There is only one version of this model, created over 8 years ago by Larry Bencivengo.

Attached files

File	Type	Description	Last updated
MIHS Sample for Inheritance and Tendency.png	preview	Preview for 'MIHS Sample for Inheritance and Tendency'	over 8 years ago, by Larry Bencivengo	Download

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