Ecological theory is NOT based on this premise:

a. All levels of the environment, macro, exo, meso, micro, provide both opportunities and risks
b. Allows practitioner to get picture of wide range of factors impacting a client's life
c. Focuses on individual and personal characteristics, flaws, and negative perceptions
d. Acknowledges that individuals are a product of their environment

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.