Natural Selection Explained! - Simple definition w/ 3 examples
Автор: DillonTheBiologist
Загружено: 2025-10-09
Просмотров: 61
Natural Selection is the most widely known, but also misunderstood evolutionary force. This video provides a simple definition for selection, 3 theoretical examples, simple calculations for fitness, and how we are able to simulate selection in our evolution simulator.
The evolution simulator will be used for an upcoming Evolutionary biology course, exclusive to members of the Learn Adventurously Bioclub. However, the tool itself will be freely accessible on Learn Adventurously. Learn more at LearnAdv.com
Line chart tutorial in d3 from @datavizdad • Create Beautiful Line Charts With D3 - D3....
Paper for equations -Lachance 2009 Detecting selection-induced departures from Hardy-Weinberg proportions https://pmc.ncbi.nlm.nih.gov/articles...
Chapter Markers:
00:00 -Intro
00:24 - Basic Definition
00:54 - Terms: Selection for, against, and on
01:17 - Fitness Values
02:10 - Selection acts for, against, or neutrally on a trait
03:12 - 3 Examples of Natural Selection
04:03 - Example 1: Selection acting for a trait
05:14 - Example 2: Selection acting against a trait
06:22 - Example 3: Selection acting for and against traits
07:34 - Pattern does not equal process
09:00 - How do we simulate Natural Selection?
09:45 - p2 + 2pq + q2 review
10:40 - Adding Fitness Values
11:52 - How to calculate relative fitness
13:15 - Updating the starting frequencies
14:15 - Simulating our frog populations
16:13 - Getting even nerdier
17:00 - What math are we using to calculate selection?
17:34 - Genotypes weighted by fitness equation
18:23 - JavaScript for simulating selection
19:23 - Updating our random number generator
21:35 - Design Update: Convert chart.js to d3
22:25 - Using a colorblind color palette
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