Mechanisms of Genetics 1. In the diagram below, Gene A and Gene B are altered
through a mutation. Based on this information, which of the
following is a KNOWN correct statement?
A Gene A and Gene B have
triplets that produce the
same amino acids.
Chromosome
DNA
Gene A
Gene B
B Gene A and Gene B have a
different nitrogen base in at
least one triplet than the
original sequence.
C Gene A and Gene B code for
different proteins.
D Gene A and Gene B will be
harmfully expressed in the
organism.

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.