A synapse

A synapse is _______________. a gene that controls the nervous system.a neurotransmitter molecule.

  • a receptor on a cell that binds a neurotransmitter.
  • a type of protein.
  • a space between neurons.

Hardy-Weinberg equilibrium is possible only if the population is

  • small, with nonrandom mating and no migration, no mutation, and no natural selection.
  • large, with random mating and no migration, no mutation, and no natural selection.
  • large, with nonrandom mating, mutation, genetic drift, and natural selection.
  • small, with no migration out or in, and dominant alleles outnumbering recessive alleles.
  • comprised of very young and fertile individuals and no newcomers arrive

During interaction between genes and environment, the phenotype ____________.

  • changes the genotype
  • is expressed as discontinuous variation
  • is stable once it has been expressed in the organism
  • can be quantitatively subdivided into genotypic and environmental components
  • is variable and undergoes continuous change throughout the life of the organism
 
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