Heredity and sex . ^ withdifferent factors. I have suggested that the departuresmay be interpreted as the distance between the factorsin question. A THEORY OF LINKAGE In order to understand more fully what is meantby hnkage on the interpretation that I have herefollowed, it will be necessary to consider certain changesthat take place in s^^Tiapsis. The sex chromosomes O* ^ ^^^ >Cy: ct (&»<. ^ m= ^ ^ I^- ;o. Fig. 49. — lUustrating chiasma-type theor\-. 1 and 2. from Tritoncristatus. 3—46. chromosomes of Batracoseps att^nuatu^. Xote especiallythe chiasma shown in 13. (After Jansse
Heredity and sex . ^ withdifferent factors. I have suggested that the departuresmay be interpreted as the distance between the factorsin question. A THEORY OF LINKAGE In order to understand more fully what is meantby hnkage on the interpretation that I have herefollowed, it will be necessary to consider certain changesthat take place in s^^Tiapsis. The sex chromosomes O* ^ ^^^ >Cy: ct (&»<. ^ m= ^ ^ I^- ;o. Fig. 49. — lUustrating chiasma-type theor\-. 1 and 2. from Tritoncristatus. 3—46. chromosomes of Batracoseps att^nuatu^. Xote especiallythe chiasma shown in 13. (After Janssens). 94 HEREDITY AND SEX (when two are present as in the female), hke all otherchromosomes, unite in pairs at the synaptic recognized method of uniting is for like chromosomesto come to lie side by side. Before they separate, as they do at one of the twomaturation divisions, each chromosome may be seento be spht throughout the length. Thus there are
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectsex, bookyear1913
