John and all his brothers have no antibodies caused by non-functional B cells, thus they are highly
susceptible to bacterial infections. John and his brothers most likely have a condition called
__________________. Fill in the blank(s) with the appropriate word(s).
ANS: X-linked agammaglobulinema
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A chart that displays paired chromosomes in order of size is a
A) phenotype. B) genotype. C) karyotype. D) genome.
Which of the following series of events is associated with the formation of cancer?
A. The oncogenes mutate and become proto-oncogenes which are continuously active. There is also an associated loss of tumor suppressor gene activity allowing uncontrolled growth of cells. B. The proto-oncogenes mutate and become oncogenes which are continuously active. There is also an associated loss of tumor suppressor gene activity allowing uncontrolled growth of cells. C. The proto-oncogenes mutate and become oncogenes which stop functioning altogether. There is also an associated increase in the tumor suppressor gene activity allowing uncontrolled growth of cells. D. The oncogenes mutate and become proto-oncogenes which stop functioning altogether. There is also an associated increase in the tumor suppressor gene activity allowing uncontrolled growth of cells.
Mitosis and meiosis are important processes for the survival of many animal species. If a horse's diploid number is 64, how many more chromosomes would a daughter cell produced by mitosis have than a daughter cell produced by meiosis?
A) 64 B) 32 C) 16 D) 128
The photosynthetic bacteria that form the basis of the food chain in the Great Salt Lake are classified as
A) carnivores. B) herbivores. C) secondary consumers. D) omnivores. E) producers.