how does the heterozygous advantage explain the large numbers of detrimental alleles(like sickle cell allele) in a population?

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

We are not able to see the stars. light prevents our seeing the stars. i hope it kinda : )

Where's the picture of the model?