Some Identical Twins Have the Same Genetic Makeup, but Look

question 13

Multiple Choice

Some identical twins have the same genetic makeup, but look slightly different. Their slight differences in appearance are an example of _______, which are influenced by both biology and environment.

• A) genotypes
• B) environmental selections
• C) phenotypes
• D) habitats
• E) neurons

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Definitions:

Atomic Weight

The average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element.

Structural Formula

A type of chemical formula that shows the spatial arrangement of the atoms in a molecule. Compare with the simplest formula and molecular formula.

Molecular Formula

The type of chemical formula that gives the actual numbers of each type of atom in a molecule. Compare with simplest formula and structural formula.

Lewis Structure

A graphical representation of the valence electrons in molecules, showing how the atoms are bonded together and the lone pairs of electrons.