https://gregladen.com/blog/2008/01/30/human-evolution-on-trial-speci/ Thu, 31 Jan 2008 09:53:09 +0000 hourly 1 https://wordpress.org/?v=6.4.8 https://gregladen.com/blog/2008/01/30/human-evolution-on-trial-speci/#comment-3373 Thu, 31 Jan 2008 09:53:09 +0000 http://scienceblogs.com/gregladen/2008/01/30/human-evolution-on-trial-speci/#comment-3373 Actually, for any given species, there is a straight line back through its ancestry. That doesn’t give the complete picture of evolution, however, and that’s what’s important.

]]> https://gregladen.com/blog/2008/01/30/human-evolution-on-trial-speci/#comment-3372 Thu, 31 Jan 2008 08:02:15 +0000 http://scienceblogs.com/gregladen/2008/01/30/human-evolution-on-trial-speci/#comment-3372 The XX = female XY = male is mammalian. Birds have something that could be referred to as XX = male, XY = female.

]]> https://gregladen.com/blog/2008/01/30/human-evolution-on-trial-speci/#comment-3371 Wed, 30 Jan 2008 21:08:51 +0000 http://scienceblogs.com/gregladen/2008/01/30/human-evolution-on-trial-speci/#comment-3371 News to me that female ducks have Y chromosomes. Did a little looking online in the literature and could find no mention of a Y chromosome in mallards.

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