What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?
A. He would produce twice as many sperm and would be protected against infertility from other causes.
B. He would produce twice as many sperm, which would crowd them during later development and lead to morphological defects.
C. He would be entirely normal, since this is what usually happens.
D. After one round of sperm production he would no longer be able to produce sperm and would be infertile.
D. After one round of sperm production he would no longer be able to produce sperm and would be infertile.
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A life table
A. provides data on the number of individuals alive in a particular age class. B. more often than not excludes males. C. typically includes age classes each representing one year. D. allows predictions to be made on how a population will grow. E. All of the answers are correct.
Which genetic condition is revealed in the karyotype display shown in the accompanying figure?
a. Turner syndrome b. Down syndrome c. cri-du-chat d. Triple-X syndrome e. Klinefelter syndrome
In the CAMP test a single streak of a beta-hemolytic streptococcus is placed perpendicular to a streak of beta-lysin-producing Staphylococcus aureus. After incubation a zone of increased lysis in the shape of an arrowhead is noted, which indicates the presumptive identification of ______________.
A. Streptococcus equines B. Streptococcus pyogenes C. Streptococcus bovis D. Streptococcus aggalactiae
Members of what group are multicellular producers?
A. Animals B. Protists C. Fungi D. Plants E. Bacteria