All cells of the human body contain 23
a. pairs of chromosomes.
b. chromosomes.
c. pairs of genes.
d. genes.
e. alleles.
Question 2
Doris works a stressful job, has difficulty falling asleep, and she often wakes up early. After several weeks, she agrees to participate in a sleep study to determine whether she has insomnia.
It is likely that the results of her sleep study show Doris:
a. spends less time sleeping as people who do not complain of insomnia.
b. is lacking in the substances that promote and maintain sleep.
c. spends as much time sleeping as people who do not complain of insomnia.
d. has an excess of arousal-producing neurochemicals.
Sites of mtDNA mutations in certain human diseases
(A) Lymphatic vessel with valves within tissue cells; (B) photomicrograph of lymphatic vessel with v
The Mesengenic Process in stem cells
induced pluripotent stem cells
skeleton of the human body
Stereotaxic Surgery on a Human Patient