Dentinogenesis imperfecta is a rare, autosomal, dominantly inherited disease of the teeth that occurs in about one in 8000 people (Witkop, 1957). The teeth are somewhat brown in color, and the crowns wear down rapidly
Assume that a male with dentinogenesis imperfecta and no family history of the disease marries a woman with normal teeth. What is the probability that
(a) their first child will have dentinogenesis imperfecta?
(b) their first two children will have dentinogenesis imperfecta?
(c) their first child will be a girl with dentinogenesis imperfecta?
(a) 1/2
(b) 1/2 ×1/2 = 1/4
(c) 1/2 × 1/2 = 1/4
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A. The 3' end of the mRNA binds to the small ribosomal subunit and the AUG anticodon on the tRNA base pairs with the UAC codon on the mRNA, allowing the large ribosomal subunit to attach. B. The 5' end of the mRNA binds to the small ribosomal subunit, and the large subunit joins, creating the P and A sites where reactions between codons on the mRNA and anticodons on tRNA are stabilized. C. The AUG codon on mRNA base pairs with the UAC anticodon on tRNA allowing the small and large ribosomal subunits to join the complex. D. Translation begins when the ribosome translocates from the A site to the P site on the mRNA
The letter “C” in the above figure represents the
a. style. b. ovary. c. stigma. d. anther. e. filament.
The thin layer of meristematic cells located between xylem and phloem is referred to as the:a
apical meristem. b. collenchyma. c. cork cambium. d. vascular cambium. e. pith.
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A. Voluntary B. Sympathetic C. Limbic D. Cognitive