Hemophilia is caused by a
A. dominant allele on the X chromosome.
B. codominant allele on the X chromosome.
C. recessive allele on an autosome.
D. dominant allele on an autosome.
E. recessive allele on the X chromosome.
Answer: E
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If this cell is in the middle of meiosis I, the end result of this division would be
____________________.
a. two identical haploid cells b. two haploid cells that are not identical c. two identical diploid cells d. two diploid cells that are not identical
Replication of DNA occurs during ____
a. S phase b. G1 phase c. G0 phase d. prophase e. cytokinesis
Which characteristic will NOT strengthen the validity of a theory?
a. repetitions of experiments b. increased observations c. time after the experiment d. faith in the experiment e. confirmation by many scientists
Most animals on land have __________ fertilization;
gametes meet in a female’s body.