Recessive traits are expressed only in the homozygous state
a. True
b. False
ANSWER: True
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You digest DNA from the frog Xenopus laevis with the enzyme NotI that produces sticky DNA ends. You can ligate your DNA to:
_____ blunt AluI ends from Xenopus laevis. _____ sticky NotI ends from Xenopus laevis. _____ blunt AluI ends from bacteria. _____ sticky NotI ends from bacteria. _____ sticky EcoRI ends from Xenopus laevis. _____ sticky EcoRI ends from bacteria.
Before Title IX was enforced, one myth that authorities embraced about women’s participation in competitive sports was that
a. Soviet women's gender had to be verified clinically b. their marriageability would be jeopardized c. black athletes were superior to white athletes d. There reproductive organs would be harmed
When Frederick Griffith infected mice with S. pneumoniae that lacked a capsule, the mice
A. remained healthy. B. reproduced quicker. C. died of pneumonia. D. became ill but lived.
The pouch of skin that encloses a human male's testes is called the ________.
A. epididymis B. semen C. acrosome D. vas deferens E. scrotum