Adna double helix is 500 nucleotides long, so it contains a total of 1,000 nucleotides between the two strands of the double helix. if 300 of those nucleotides are adenine (a), how many would be guanine (g) g

200

Explanation:

According to Chargaff's rules , Adenine pairs with Thymine and Guanine pairs with Cytosine, so in a DNA double helix the number of A bases equals the number of T bases, and the number of G bases = C bases.

If 300 nucleotides are A, then 300 are also T.

A+T= 600 nucleotides out of 1000, so the remaining 400 must be G+C.

Because the number of G equals the number of C, there must be 200 Guanine nucleotides in that molecule.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully