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Dimorphism

Dimorphism

Having two different distinct forms of individuals within the same species or two different distinct forms of parts within the same organism. For plants, it could refer to different leaf types, flowers, etc. For animals, it could refer to different colouring, sizes, features, etc. Sexual dimorphism is a common case, where the two sexes have different shapes, sizes, etc. From each other.


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Molecular gene (genome) concept scientifically untenable

... expression rather than genetic polymorphism (differences in genes themselves). One of the best understood insect polyphenisms is the queen-worker dimorphism in honey bees. Both the queens and the workers are females but morphologically distinct forms. Besides, the queen is fertile whereas the ...

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by PAWahid
Wed May 02, 2012 4:54 am
 
Forum: Molecular Biology
Topic: Molecular gene (genome) concept scientifically untenable
Replies: 12
Views: 28991

Evolution questions

... e. recombination. My answer was C. An oak tree produces two kinds of leaves: large with shallow lobes and narrow with deep lobes. If this dimorphism is based solely on the ecological condition of amount of sunlight exposure and there is no genetic difference between leaves that express ...

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by Ryosuke
Fri Nov 18, 2011 7:21 am
 
Forum: Evolution
Topic: Evolution questions
Replies: 1
Views: 5788

Re: Sexual Selection

Before thinking about how dimorphism evolves, it's much more important to think in why exists in the fist place.

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by ruiseixas
Tue May 24, 2011 10:46 pm
 
Forum: Evolution
Topic: Sexual Selection
Replies: 6
Views: 8535

Re:

... product of conditioning by experience. It's the age-old nature vs. nurture debate. Partly true, but some particular examples of physical sexual dimorphism do come to mind, which can only be caused by genetics. Environmental conditioning does not, for example, cause male peacocks to have and ...

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by Anaximenes
Thu May 01, 2008 8:14 pm
 
Forum: Evolution
Topic: Evolution of the distinction of gender
Replies: 9
Views: 9430

Re: Evolution of the distinction of gender

Sexual dimorphism in some species also seems to have important results in terms of encouraging pro-survival activities and behaviours. For example, in insect populations like bees and ants, the phenomenon of gender allows members ...

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by Anaximenes
Sun Apr 27, 2008 10:37 pm
 
Forum: Evolution
Topic: Evolution of the distinction of gender
Replies: 9
Views: 9430
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