Genotype refers to the two ​ (a)   that control the phenotype of a trait

Ex: Eye Color

​ (b)   - Homozygous (same) Dominant brown = 2 brown

​ (c)   - Homozygous (same) recessive blue = 2 blue

​ (d)   - Heterozygous (not same) = 1 brown + 1 blue​

Phenotype refers to the ​ (a)   characteristics of an organism coded for by their ​ (b)   .

Alleles are different versions of a ​ (a)   (dominant and ​ (b)   )

Ex: Eye Color

B = ​ (c)   allele for Brown Eyes

​ (d)   = Recessive allele for blue eyes

DNA mutations are random ​ (a)   in DNA that lead to a changes in ​ (b)   sequences that code for specific ​ (c)  

*Addition/Insertion = More bases

*Deletion = Fewer bases                         

*Substitution = Same number but different sequence (A, T, C, or G)

Evolution refers to the changes in ​ (a)   traits over time (thousands to millions of years), resulting in new ​ (b)   that are ​ (c)   for specific environments.

Survival of the ​ (a)   means that individuals that are better adapted to their ​ (b)   survive and pass on their ​ (c)   more successfully.

Natural selection occurs when ​ (a)   factors select for or against the ​ (b)   of an organism, determining their fitness for ​ (c)   .

A structural ​ (a)   is a physical feature with a specific ​ (b)   that contributes to the ​ (c)   of the organism.

A ​ (a)   ancestor is an ancestral ​ (b)   from which later species ​ (c)   .

A gene pool is all the ​ (a)   , including all the different ​ (b)   for each gene, that are present in a ​ (c)   at any one time.

The ​ (a)   system consists of Domain, Kingdom, Phylum, Class, Order, Family, Genus, ​ (b)   .

​ (a)   was the English natural scientist who formulated a theory of ​ (b)   by natural selection (1809-1882).

Fossils are the ​ (a)   remains of once-living ​ (b)   ; they are evidence for ​ (c)   .

A ​ (a)   structure is a structure that is present in an organism but ​ (b)   serves its original ​ (c)   .

​ (a)   anatomy is the study of ​ (b)   and differences among ​ (c)   of living species.

​ (a)   refers to the struggle between organisms to ​ (b)   in a habitat with ​ (c)   resources.

The ​ (a)   capacity is the ​ (b)   number of individuals of any population that an ​ (c)   can support.

A limiting factor is any ​ (a)   (living) or ​ (b)   (nonliving) factor that helps determine the​ (c)   .

A behavioral ​ (a)   is an ​ (b)   behavior that helps an organism ​ (c)   .

Heritable traits are traits (​ (a)   ) that can be passed on ​ (b)   (DNA) from parent to ​ (c)   (child).

​ (a)   pressures are the factors (​ (b)   or biotic) in an ecosystem which put pressure on an organism's ​ (c)   and increase ​ (d)    .

Fitness (for survival) refers to how well an organism can survive and ​ (a)   in its ​ (b)  

=> white fur in snow vs. black fur.