Help!! please just a bit confused

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 .

Which of these is not a nucleotide base found in dna?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?