A rare recessive trait in a pedigree is indicated by which pattern of inheritance?
A) vertical
B) horizontal
C) diagonal
D) both vertical and horizontal
E) pure-breeding
B) horizontal
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Malthus' idea that was incorporated into the natural selection summary by Darwin suggested that limited resources
A. preserve harmful variations and eliminate favorable variations in a population. B. eliminate both favorable and harmful variations in a population. C. preserve favorable variations and eliminate harmful variations in a population. D. preserve favorable and harmful variations in a population. E. neither preserve nor eliminate harmful variations in a population.
The term that describes a tissue lacking oxygen is ____
a. hypoxic b. hyperemia c. hyperbaric d. hypercapnia e. hyperventilate
Which enzyme is responsible for adding complementary DNA bases to an exposed DNA strand?
A) DNA helicase B) DNA polymerase C) DNA ligase D) DNA peptidase
The union of the sperm and the egg that results in a cell with 46 chromosomes is called a(n) ________
A) embryo B) zygote C) trophoblast D) fetus