An organism possesses one copy of each allele type for a given gene. It is said to be...
homozygous recessive for both alleles
heterozygous for the gene
genotypically inactive

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals