Question

question 28

the difference between the different alleles of a gene is

the type of lipid they are composed of.

the way they are copied when the cell divides.

their dna base sequences.

they are not heritable.

Explanation:

Alleles are alternative forms of a gene. Genes are made of DNA. The key difference between different alleles of a gene lies in their DNA base - pair sequences. Lipids are not part of the composition of genes (which are nucleic acids). All genes (and thus alleles) follow the same general mechanism of replication during cell division (semi - conservative replication). Also, alleles are heritable as they are passed from parents to offspring during reproduction.

Answer:

their DNA base sequences.