1£®When did McClintock get a doctorate degree?

A£®In 1921.    B£®In 1923.

C£®In 1925.    D£®In 1927.

2£®In the middle of the great Depression in the US, ________£®

A£®male geneticists were in great demand

B£®young scientists might have trouble finding a job

C£®female geneticists were not in demand at all

D£®male scientists lost their jobs and were out of work

3£®Which of the following jobs was beneficial to McClintock's research?

A£®A job as a botany teacher.

B£®A temporary job in the genetics department.

C£®A permanent position in the laboratory.

D£®A job to research cancer.

4£®Why was McClintock awarded a Nobel Prize?

A£®Because she received a degree in genes and chromosomes.

B£®Because she contributed to genetic engineering and cancer research.

C£®Because she made important discoveries about genes and chromosomes.

D£®Because she was the first American woman who study genes and chromosomes.