Inbreeding And Outbreeding : Their Genetic And Sociological Significance
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There is definite evidence that sexual reprodnc- 195 196 INBEEEDING ^ND OUTBREEDING tion does not differ from asexual reproduction in what may be called the heredity coefficient. It holds out no advantage as an actual means for the transmis- sion of characters.
The majority of zoological data on this subject has little value on account of the experimental difficulties in- herent in the material, although zoologists have published more on the matter than the botanists. Plants furnish the best ma...terial because of the ease in handling large num- bers of both cuttings and seedlings side by side, and be- cause of the opportunity to utilize hermaphroditic species. Even with the best plant material several undesired vari- ables are present, and experiments with them, therefore, are not without their disappointments ; but no one who has had a long and intimate experience in handling pedi- gree cultures of plants can have any doubts concerning the correctness of our conclusion. Practically the inquiry must take the form of a comparison between the varia- bility of a homozygous race when propagated by seeds and when propagated by some asexual method.
What to read after Inbreeding And Outbreeding : Their Genetic And Sociological Significance?
You can find similar books in the "Read Also" column, or choose other free books by Edward M Edward Murray East to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
There is definite evidence that sexual reprodnc- 195 196 INBEEEDING ^ND OUTBREEDING tion does not differ from asexual reproduction in what may be called the heredity coefficient. It holds out no advantage as an actual means for the transmis- sion of characters.
The majority of zoological data on this subject has little value on account of the experimental difficulties in- herent in the material, although zoologists have published more on the matter than the botanists. Plants furnish the best ma...terial because of the ease in handling large num- bers of both cuttings and seedlings side by side, and be- cause of the opportunity to utilize hermaphroditic species. Even with the best plant material several undesired vari- ables are present, and experiments with them, therefore, are not without their disappointments ; but no one who has had a long and intimate experience in handling pedi- gree cultures of plants can have any doubts concerning the correctness of our conclusion. Practically the inquiry must take the form of a comparison between the varia- bility of a homozygous race when propagated by seeds and when propagated by some asexual method.
What to read after Inbreeding And Outbreeding : Their Genetic And Sociological Significance?
You can find similar books in the "Read Also" column, or choose other free books by Edward M Edward Murray East to read onlineMoreLess
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