Transgenic organisms are used to clarify which gene may be responsible for a mutant phenotype because
A) individuals with a mutant phenotype can carry mutations in more than one gene.
B) the genes that cause diseases are always dominant.
C) the genes that cause diseases are always recessive.
D) strains used to create transgenic organisms carry no mutations and all their genes are wild-type.
A) individuals with a mutant phenotype can carry mutations in more than one gene.
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An exergonic reaction will have a ____
a. negative change in kinetic energy b. positive change in enthalpy c. negative change in entropy d. DG = 0 e. negative change in free energy
A reflex ____
a. only involves the use of sensory neurons b. is an automatic response to a stimulus that requires considerable thought c. is an automatic response to a stimulus that doesn't require thought d. is an involuntary response that requires only one neuron e. does not require the brain
Where in the lymph node do the T cells first encounter antigens presented by dendritic cells?
What will be an ideal response?
You read that the frequency of a particular disease-associated recessive allele in a population is 12%. What does that mean?
A) 12% of the population has the disease caused by that allele. B) 12% of the population is a carrier for that disease. C) For every 100 people, there are 12 copies of the allele. D) The allele is present in 12% of the cells in your body.