Determination of Sex


THOSE who are interested in the heredity of sex will be grateful to Prof. MacBride for again exposing in these columns1 the naïveté of some early views of this problem (which he attributes to Morgan). Especially will they be reassured by his conclusion. He points out that sex is essentially the same thing wherever it occurs. He concludes:—“It seems clear that there are fundamentally opposed male and female constitutions, but that the constitution of every individual is a mixture of the two, and that the structural manifestations of sex depend on the proportion of these constitutions and on which gains the upper hand in development” (italics mine).

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  1. 1

    NATURE, 133, 359, March 10, 1934.

  2. 2

    Quart. Rev. Biol., 6, 127; 1931.

  3. 3

    Amer. Nat., 56, 59; 1922.

  4. 4

    Biol. Bull., 3, 43–74; 1902.

  5. 5

    Science, N.S., 32, 839; 1911.

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