. The physical basis of heredity . Heredity. CROSSING OVEE 93 spines. A list of these classes with the expectation based on the results from a single experiment is given below. Non-crossover ( w mf \WM Single crossover in 1st \^ ^^S'°° IWmf in 2nd f """ -^ ^â '^ region \w Mf Double crossover in both j «- ^/ regions \wâps^ Inasmuch as this subject and certain peculiarities in the results can be better understood after the evidence for w /. âScheme to illustrate double crossing over between white and forked. The gene for miniature standing b
. The physical basis of heredity . Heredity. CROSSING OVEE 93 spines. A list of these classes with the expectation based on the results from a single experiment is given below. Non-crossover ( w mf \WM Single crossover in 1st \^ ^^S'°° IWmf in 2nd f """ -^ ^â '^ region \w Mf Double crossover in both j «- ^/ regions \wâps^ Inasmuch as this subject and certain peculiarities in the results can be better understood after the evidence for w /. âScheme to illustrate double crossing over between white and forked. The gene for miniature standing between furnishes the evidence. the linear order of the genes has been discussed, I shall not press further the discussion here. It should be pointed out, however, that the question of crossing over involves more than the independent action of the pairs in the cases so far considered; for, as will be shown later, when cross- ing over takes place not single genes but great groups of genes are involved. This block effect, as it may be called,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Morgan, Thomas Hunt, 1866-1945. Philadelphia : Lippincott
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