Recessive X-linked traits are more likely to be expressed in a male fruit fly than a female fruit fly because
A) the male's phenotype results entirely from his single X-linked gene.
B) the male chromosome is more fragile than the female chromosome.
C) the male chromosome is more susceptible to mutations.
Answer: A
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Which of the following is most true of sexual reproduction?
A) Sexual reproduction allows for more rapid population growth than does asexual reproduction. B) Only half of the offspring from sexually reproducing females are also females. C) Asexual reproduction produces offspring of greater genetic variety. D) Sexual reproduction is completed more rapidly than asexual reproduction. E) Asexual reproduction is better suited to environments with extremely varying conditions.
Some enzymatic receptors and most G protein-coupled receptors transmit the signal into the cytoplasm by utilizing other substances within the cytoplasm that are referred to as:
A. genes. B. intracellular receptors. C. second messengers. D. first messengers.
Sperm cells and egg cells (oocytes) are called
A) grommets. B) marmites. C) gametes. D) gonads.
What is the active site? a. The bottom of the substrate
b. The site on the enzyme in which the substrate attaches. c. The site on the reactant in which the enzyme attaches. d. The surface of the enzyme. e. The site on the substrate in which the enzyme attaches.