Different, or alternative, forms of the same gene are called ____
a. genetomorphs
b. alleles
c. mutants
d. chromatids
e. homologues
ANSWER: b
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Why is whole-exome sequencing cheaper and faster than whole-genome sequencing?
a. It only sequences the proteins produces by the DNA. b. It only sequences the DNA’s short, non-coding regions. c. It only sequences the DNA’s coding, exon-producing regions. d. It only sequences the promoter regions.
The types of living organisms on Earth have changed over time, new species have originated, and species have disappeared. These are examples of
A. macroevolution. B. extinction. C. speciation. D. hybridization. E. alternation of generations.
The aptly named dead horse arum has a heat-producing flower. What advantage does this heat provide?
A) It enables blooms to emerge through snow. B) It prevents inefficient pollinators from collecting pollen. C) It warms the pollinators, which are usually bats. D) It creates a barrier to invasive plant species. E) It increases the evaporation of the scent, attracting pollinators from greater distances.
What explanation is generally given for lethality of monosomic individuals?
A) The gametes of monosomic individuals cannot undergo meiosis, and this is lethal. B) Monosomy may unmask recessive lethals that are tolerated in heterozygotes carrying the wild-type allele. C) Cells count the number of chromosomes they have and will undergo apoptosis when the chromosome number is incorrect. D) The loss of a single chromosome is not generally lethal, unless the individual is inbred. E) Monosomic chromosomes cannot undergo mitosis correctly.