ANSWER: Biology

Fraternal

Fraternal or dizygotic (DZ) twins (also referred to as "non-identical twins", "dissimilar twins", "biovular twins", and, in cases of females, occasionally sororal twins) usually occur when two fertilized eggs are implanted in the uterus wall at the same time. When two eggs are independently fertilized by two different sperm cells, fraternal twins result. The two eggs, or ova, form two zygotes, hence the terms dizygotic and biovular.

Fraternal twins, like any other siblings, have an extremely small chance of having the same chromosome profile. Like any other siblings, fraternal twins may look similar, particularly given that they are the same age. However, fraternal twins may also look very different from each other. They may be of different sexes or the same sex. The same holds true for brothers and sisters from the same parents, meaning that fraternal twins are simply brothers and/or sisters who happen to be the same age.

Matt: CORRECT
Record: 342-300