What are the 3 layers of the sun from the inner layer to the outer layer?

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

How many chromosomes are in a gold fish?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.