Answer: HS.LS1.A: Structure and Function
All cells contain genetic information in the form of DNA molecules.
Genes are regions in the DNA that contain the instructions that code
for the formation of proteins. (HSLS31)
DCI: Heredity: Inheritance and Variation of Traits
HS.LS3.A: Inheritance of Traits
Each chromosome consists of a single very long DNA molecule, and
each gene on the chromosome is a particular segment of that DNA.
The instructions for forming species’ characteristics are carried in
DNA. All cells in an organism have the same genetic content, but the
genes used (expressed) by the cell may be regulated in different
ways. Not all DNA codes for a protein; some segments of DNA are
involved in regulatory or structural functions, and some have no asyet known function. (HSLS31)
DCI: Heredity: Inheritance and Variation of Traits
HS.LS3.B: Variation of Traits
Step-by-step explanation:
In sexual reproduction, chromosomes can sometimes swap sections
during the process of meiosis (cell division), thereby creating new
genetic combinations and thus more genetic variation. Although DNA
replication is tightly regulated and remarkably accurate, errors do
occur and result in mutations, which are also a source of genetic
variation. Environmental factors can also cause mutations in genes,
and viable mutations are inherited. (HS