HOW DOES POSITIVE AND NEGATIVE FEEDBACK CAN RESULT IN ENVIRONMENTAL CHANGE

5) these are organisms where the genetic material is not bound by a nucleus. they are usually unicellular.

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.

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources