A Critique of the Theory of Evolution
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In our eReader you can find the full English version of the book. Read A Critique of the Theory of Evolution Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Critique of the Theory of Evolution
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Four sperms result, each with half (haploid) the full number (diploid) of chromosomes.
some paternal chromosomes, i. E. One or the other member of each pair. At the other di- vision each chromosome simply splits as in ordinary cell division.
The upshot of the process is that the ripe eggs (fig. 51) and the ripe spermatozoa (fig.
THEORY OF EVOLUTION 99 FIG. 51. The two maturation divisions of the egg. The divi- sions are unequal, so that two small polar bodies are formed one of these subsequentl...y divides. The three polar bodies and the egg are comparable to the four sperms.
50) come to contain only half the total num- ber of chromosomes.
When the eggs are fertilized the whole num- ber of chromosomes is restored again.
THE MECHANISM OF MENDELIAN HEREDITY DISCOVERED IN THE BEHAVIOR OF THE CHROMOSOMES If the factors in heredity are carried in the chromosomes and if the chromosomes are defin- ite structures, we should anticipate that there should be as many groups of characters as there are kinds of chromosomes.
What to read after A Critique of the Theory of Evolution?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Hunt Morgan to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Four sperms result, each with half (haploid) the full number (diploid) of chromosomes.
some paternal chromosomes, i. E. One or the other member of each pair. At the other di- vision each chromosome simply splits as in ordinary cell division.
The upshot of the process is that the ripe eggs (fig. 51) and the ripe spermatozoa (fig.
THEORY OF EVOLUTION 99 FIG. 51. The two maturation divisions of the egg. The divi- sions are unequal, so that two small polar bodies are formed one of these subsequentl...y divides. The three polar bodies and the egg are comparable to the four sperms.
50) come to contain only half the total num- ber of chromosomes.
When the eggs are fertilized the whole num- ber of chromosomes is restored again.
THE MECHANISM OF MENDELIAN HEREDITY DISCOVERED IN THE BEHAVIOR OF THE CHROMOSOMES If the factors in heredity are carried in the chromosomes and if the chromosomes are defin- ite structures, we should anticipate that there should be as many groups of characters as there are kinds of chromosomes.
What to read after A Critique of the Theory of Evolution?
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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