Which one of the following is the most accurate description of the pedigrees used in human genetics?
A. Family tree charts showing who has/had a particular trait.
B. Certificates verifying that an individual has a particular trait.
C. Certificates of good genetic health.
D. Family tree charts showing everyone's birth and death dates.
E. Family tree charts showing photographs of all individuals.
A
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Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain becomes nonlethal. Type R Streptococcous pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The S strain would be transformed into the nonvirulent R strain and kill the host. B. The R strain would be transformed into the virulent S strain and kill the host. C. The S strain would be transformed into the nonvirulent R strain and not affect the host. D. The R strain would be transformed into the virulent S strain and not affect the host. E. Neither the S nor the R strain would change.
In eukaryotic cells, ________ are energy-producing organelles that contain DNA
A) nuclei B) lysosomes C) chromosomes D) nucleoli E) mitochondria
Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. If we assume no introns are involved, how many amino acids does the polypeptide encoded by this gene have?
A) 12 B) 6 C) 2 D) 4
Naked capsid animal viruses are commonly released from the infected cell by ________, a process the host cell does not survive
A) budding B) lysis C) endocytosis D) membrane fusion E) exocytosis