After mitosis, the chromosome number of a daughter cell is __________ parent cell's.
A) the same as
B) one-half
C) rearranged compared to
D) doubled compared to
Answer: A) the same as
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A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mammal so that the protein will be secreted into the milk of the mammary gland. What is required for the researcher's success?
A. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in mammary cells. B. The gene should be placed next to the promoter of a gene that is expressed in mammary cells. C. The gene should be placed a considerable distance away from the promoter of a gene that is expressed in multiple types of cells. D. The gene should be placed next to the promoter of a gene that is expressed in multiple types of cells. E. The gene should be inserted in place of the promoter of a gene that is expressed in multiple types of cells.
The mammalian acrosome contains enzymes that
a. digest the zona pellucida. b. digest the endometrium. c. stimulate ovulation. d. stimulate sperm motility. e. inhibit premature ejaculation.
In the human male, sperm are produced in the
a. bulbourethral glands. b. prostate. c. seminiferous tubules. d. vas deferens. e. epididymis.
There are two main subgroups of primates: the wet-nosed primates (Strepsirrhini) and the dry-nosed primates (Haplorhini). Which of the following belong to the subgroup with a wet nose and a fixed upper lip?
1.apes 2.humans 3.lemurs 4.monkeys