Examlex
Why does the core of a main-sequence star have to be hotter to burn helium into carbon than hydrogen into helium?
Chromosomes
Rod-shaped structures in the nuclei of body cells, which contain all the genes and carry all the genetic information necessary to make a human being.
Monozygotic Twins
Twins who are genetically identical, resulting from the splitting of a single fertilized egg.
Genetically Identical
Describes organisms, such as twins or cells, that have exactly the same DNA.
Dizygotic Twins
Also known as fraternal twins, these are siblings born from two separate eggs fertilized by two different sperm, sharing about 50% of their DNA.
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