On the manner in which the disposition to carcinoma of the mammary gland is inherited in mice

1. In transmitting the disposition to cancer of the mammary gland with the mouse an extrachromosomal factor plays an important part. 2. Probably this extrachromosomal factor will work through the ovular plasm. 3. With the aid of such an extrachromosomal factor only part of the facts observed can be explained: chromosomal factors too play an important part… (More)