Question

Since they are both human tissues, they will have similar sequences and amounts of adenine, guanine, cytosine, and thymine. However, they still are different types of tissue, so their sequencing and proportions have to be slightly different. If they had the exact same proportions and sequence, they would be the same organism.

Answer 1

DNA base composition varies between species but not within individuals or tissues of the same species. Chargaff's rules state that adenine equals thymine and guanine equals cytosine. These rules and base sequences are pivotal in species identification and understanding genetic information.

Step-by-step explanation:

The question is regarding the base composition and sequences found in DNA across different types of human tissues and species. As discovered by Erwin Chargaff, the quantities of adenine (A), thymine (T), guanine (G), and cytosine (C) differ between species but are consistent within individuals of the same species.

This is encapsulated in what is known as Chargaff's rules, which state that A equals T and G equals C. The DNA sequence and nucleotide bases proportions can be used to identify different species, but within a single species, individuals will exhibit the same ratios of A:T and G:C regardless of the tissue type.

DNA and RNA share the bases adenine, guanine, and cytosine, but RNA contains uracil (U) instead of thymine (T). The particular sequence of these bases along with the DNA molecule determines the genetic code, with base-pairing rules stating that A always binds with T, and C always binds with G in DNA.