Why can fraternal twins be different genders, but identical are always the
same gender?
O
A. Fraternal twins grow in different uteruses.
B. Fraternal twins are formed by the same sperm.
O
c. Fraternal twins have different chromosomes.
O
D. Fraternal twins are born at different times.

 C

Explanation: identical twins will have identical physical features such as hair color and eye color, because they were formed from the exact same egg and sperm. Fraternal twins are formed from two different eggs and sperm, so those twins will look different from each other.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?