Koopman’s research on mouse meiosis showed that
a. there is a meiosis promoting gene.
b. a meiosis inhibiting gene leads to retinoic acid production.
c. retinoic acid prevents meiosis.
d. the Cyp26b1 gene is expressed in testes but not ovaries.
e. there is no effect if male mice do not have a Cyp25b1 gene.
D
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