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The chromosomes of clypeaster rosaceus
Author(s) -
Gardiner Mary S.
Publication year - 1927
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050430210
Subject(s) - biology , mitosis , ploidy , somatic cell , genetics , chromosome , karyotype , constant (computer programming) , evolutionary biology , gene , computer science , programming language
The diploid number of chromosomes obtained from counts of anaphases of the first somatic mitosis is found to be forty‐four. Of these, seven have terminal, thirty‐seven non‐terminal attachment, giving a distribution of seven rods, thirteen V's, and twenty‐four J's. The number is constant in all the fertilized eggs counted, indicating an XX–XY arrangement of the sex chromosomes.