By J. Heather Cullen

ISBN-10: 0791072487

ISBN-13: 9780791072486

ISBN-10: 1438124082

ISBN-13: 9781438124087

Offers the existence and profession of the geneticist who in 1983 was once presented the Nobel Prize for her research of maize cells.

Show description

Read or Download Barbara McClintock: Geneticist (Women in Science) PDF

Best specific groups books

Read e-book online Silent Witness: The Untold Story of Terri Schiavo's Death PDF

All of us watched Terri Schiavo die. the debate round her case ruled the headlines and speak exhibits, going all of the method to the U. S. very best court docket, the White condominium, and the Vatican. And it isn't over but. regardless of her dying, the debate lingers. In Silent Witness, former LAPD detective and big apple instances bestselling writer Mark Fuhrman applies his hugely revered investigative talents to envision the clinical proof, criminal case records, and police files.

Read e-book online Arab Women's Lives Retold: Exploring Identity Through PDF

A suite of pioneering essays demanding the existing stereotypes of center jap girls throughout the research of first-person writing. interpreting overdue twentieth-century autobiographical writing by way of Arab ladies novelists, poets, and artists, this anthology explores the ways that Arab ladies have portrayed and created their identities inside of differing social environments.

Peggy Shinner's You Feel So Mortal: Essays on the Body PDF

Toes, bras, autopsies, hair—Peggy Shinner takes a good, unflinching examine them all in you're feeling So Mortal, a suite of searing and witty essays in regards to the physique: her personal physique, girl and Jewish; these of her mom and dad, the our bodies she got here from; and the collective physique, with all its historic, social, and political implications.

Additional resources for Barbara McClintock: Geneticist (Women in Science)

Sample text

This group greatly enjoyed discussing how chromosomes and genes worked and welcomed input from any new graduate student. One of McClintock’s first research collaborators was 51 52 BARBARA MCCLINTOCK another woman, Harriet Creighton, who arrived at Cornell in the summer of 1929. Creighton had just graduated from Wellesley College, a women’s college near Boston, Massachusetts. Many women earned undergraduate degrees in botany from Wellesley, and many went on to graduate studies at Cornell and the University of Wisconsin.

McClintock continued her investigation into the nature of ring chromosomes. It quickly became obvious to her that the broken ends of chromosomes were incredibly reactive—that they seemed desperate to link to other pieces. Once they were broken, the chromosomal fragments quickly joined any broken chromosomal end nearby, even the other end of their own broken chromosome, in which case they would form a ring. The chromosome from which the ring was formed then quickly “healed” itself, closing off all possibility of further interaction with the ring, even if the ring were capable of it.

These toxic elements are called teratogens. A miscarriage during pregnancy may be nature’s way of ensuring that a baby whose mutations are too extensive for its survival is not born. Choosing a Career: 1927–1941 ways. Life would try to express its variations through these chance changes in chromosomes. Because chromosomes were expressed in pairs, many of these abnormal chromosomes would never be expressed; but every once in a while, the viability of an offspring would depend on the new chromosomes.

Download PDF sample

Barbara McClintock: Geneticist (Women in Science) by J. Heather Cullen

by Jeff

Rated 4.08 of 5 – based on 34 votes