Understanding through Discussion


Welcome! You are not logged in. [ Login ]
EvC Forum active members: 64 (9021 total)
46 online now:
DrJones* (1 member, 45 visitors)
Newest Member: Ashles
Post Volume: Total: 882,630 Year: 276/14,102 Month: 276/294 Week: 32/136 Day: 32/27 Hour: 0/1


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   How is Natural selection a mechanism?
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 129 of 191 (816139)
07-30-2017 2:59 AM
Reply to: Message 128 by AndrewPD
07-29-2017 12:35 PM


H to O
I think you mean spontaneously; although nothing happens if it is untroubled by a spark.

This message is a reply to:
 Message 128 by AndrewPD, posted 07-29-2017 12:35 PM AndrewPD has not yet responded

  
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 176 of 191 (816614)
08-08-2017 7:09 AM
Reply to: Message 171 by AndrewPD
08-05-2017 2:08 PM


Re: the original topic issue was ... ?
AndrewPD writes:

I am exclusively gay and that has led to the puzzle of how this ruthless mechanism wouldn't have weeded that out.


Even though gay people can have children natural selection should work so long as on average they have less children than straights.
One explanation is that being gay is not due to genes, not heritable, so then natural selection won't have any effect. Perhaps it is a trait that appears randomly in each generation.

Edited by CRR, : edited


This message is a reply to:
 Message 171 by AndrewPD, posted 08-05-2017 2:08 PM AndrewPD has not yet responded

Replies to this message:
 Message 178 by Pressie, posted 08-08-2017 8:43 AM CRR has responded
 Message 181 by Taq, posted 08-08-2017 12:52 PM CRR has responded

  
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 185 of 191 (816658)
08-09-2017 3:30 AM
Reply to: Message 178 by Pressie
08-08-2017 8:43 AM


Re: the original topic issue was ... ?
Do you have any idea what natural selection is?

Natural selection happens when there is differential reproductive success over multiple generations. Those that have more offspring are favoured and those with less are disfavoured.
It's not necessarily the fastest or the strongest that succeed.
Over 1 generation chance can play a big factor but over multiple generations it tends to even out.

This message is a reply to:
 Message 178 by Pressie, posted 08-08-2017 8:43 AM Pressie has responded

Replies to this message:
 Message 188 by Pressie, posted 08-11-2017 5:25 AM CRR has not yet responded

  
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 186 of 191 (816659)
08-09-2017 3:42 AM
Reply to: Message 181 by Taq
08-08-2017 12:52 PM


Natural selection & homosexuality
All of that is quite true. It's somewhat like how sickle cell trait provides some immunity to malaria. In that case sickle cell trait is a harmful mutation affecting red blood cells and malaria resistance is a side effect. In malaria prone areas at low allele frequencies the beneficial side effect is stronger than the harmful ones, but by the time it reaches 20% the harmful effects dominate. (If it's not a malaria prone area the trait provides no benefit.)

And if homosexuality is not heritable then natural selection won't work at all. AFAIK it's not heritable so no natural selection.


This message is a reply to:
 Message 181 by Taq, posted 08-08-2017 12:52 PM Taq has responded

Replies to this message:
 Message 187 by Taq, posted 08-09-2017 10:56 AM CRR has not yet responded

  
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 190 of 191 (816890)
08-13-2017 2:32 AM


[deleted duplicate message]

Edited by CRR, : No reason given.


  
CRR
Member (Idle past 986 days)
Posts: 579
From: Australia
Joined: 10-19-2016


Message 191 of 191 (816891)
08-13-2017 2:34 AM
Reply to: Message 91 by AndrewPD
07-24-2017 8:25 PM


Re: How would you design an experiment/test?
AndrewPD, has your original question been answered yet?

This message is a reply to:
 Message 91 by AndrewPD, posted 07-24-2017 8:25 PM AndrewPD has not yet responded

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.0 Beta
Innovative software from Qwixotic © 2021