What would be the best source of information for an essay about sharks

When does dna replication(make a copy of itself)?

As a small change in a person's dna can cause a genetic disorder

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .