The book A Critique of the Theory of Evolution was written by author Thomas Hunt Morgan Here you can read free online of A Critique of the Theory of Evolution book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Critique of the Theory of Evolution a good or bad book?
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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.
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