Lecture 10-Species Concept

Lecture 10-Species Concept - Lecture 10-Species Concept A...

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Lecture 10-Species Concept A Species -A population of organisms who interbreed to produce fertile offspring -Implies sexual reproduction Hermaphrodite- produces both eggs and sperm Sequential Hermaphroditism- an individual may be male or female, female or male, in turn. Androdioecy -Natural populations of functional males and hermaphrodites. No true female genochorists -Therefore, populations include some highly homozygous inbred strains (“clones”) and some highly heterozygous individuals -There is geographic variation in the incidence of outcrossings in some species; what is true in one organism’s range may not be true somewhere else. This has a huge impact on population structure Gynogenetic -Consists only of females -To activate development of her eggs, a female must acquire sperm from a male of another species. Fertilization is internal; mechanical stimulation of sperm starts development Ring Species -Species distributed in a ring around a geographical region -Sub-species often interbreed where their
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This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.

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Lecture 10-Species Concept - Lecture 10-Species Concept A...

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