The Physical Basis of Heredity
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CHAPTER XV PARTHENOGENESIS AND PURE LINES In so far as partheiiogenetic reproduction takes place without reduction in number of the chromosomes, the expectation for any character is that it will have the same frequency distribution in successive generations, because the chromosome group is identical in each generation. There are a few cases where parthenogenetic inheritance has been studied. The results conform to expectation.
The only difference between a species reproducing by diploid parthen...ogenesis and one propagating vegetatively is that in the latter a group of cells starts the new genera- tion and in the former only one cell, viz. , an egg, that no longer undergoes reduction, or needs to be fertilized. In both, the chromosome complex remains the same as in the parent. Strictly analogous to the two foregoing methods of propagation are the cases of sexual reproduction in a homozygous group of individuals, composed of males and females or in a group of hermaphroditic forms that are homozygous.
What to read after The Physical Basis of Heredity?
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To quickly assess the difficulty of the text, read a short excerpt:
CHAPTER XV PARTHENOGENESIS AND PURE LINES In so far as partheiiogenetic reproduction takes place without reduction in number of the chromosomes, the expectation for any character is that it will have the same frequency distribution in successive generations, because the chromosome group is identical in each generation. There are a few cases where parthenogenetic inheritance has been studied. The results conform to expectation.
The only difference between a species reproducing by diploid parthen...ogenesis and one propagating vegetatively is that in the latter a group of cells starts the new genera- tion and in the former only one cell, viz. , an egg, that no longer undergoes reduction, or needs to be fertilized. In both, the chromosome complex remains the same as in the parent. Strictly analogous to the two foregoing methods of propagation are the cases of sexual reproduction in a homozygous group of individuals, composed of males and females or in a group of hermaphroditic forms that are homozygous.
What to read after The Physical Basis of Heredity?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Hunt Morgan to read onlineMoreLess
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