In a similar mermaid population, grey tails (G) are still dominant over iridescent tails (g). There are 15,000 individuals, and 12750 of them have grey tails. What is the frequency and percentage of individuals that are heterozygous for this tail color trait

About eighty five percent of the population is heterozygous for the dominant grey tail color trait. (Decimal form 0.85)

I took 15,000 divided by 12750

Next I took my answer (1.1764705882352941176470588235294‬ or 1.17 --> 1.18 (rounded up)) and divided 100 by that number. You would get ‭85.000000000000000000000000000001‬ or 85..

85%

the answer is d.) homologous; have mammary glands

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds