Down Syndrome Is

question 60

Multiple Choice

Down Syndrome is:

• A)due to a chromosomal abnormality.
• B)caused by poor folate intake early in pregnancy.
• C)strongly related to drinking alcohol during pregnancy.
• D)the result of exposure to radiation (x-rays)during the first trimester of pregnancy.

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Definitions:

Nitrogen Gas

A colorless, odorless, tasteless diatomic gas with the chemical formula N2, making up 78% of Earth's atmosphere by volume.

Resonance Structure

Depictions of a molecule showing different possible arrangements of electrons, used to describe delocalization within the molecule.

Valence Shell Electron Pair Repulsion

A theory used to predict the geometry of individual molecules based on the repulsion between electron pairs in the valence shell of an atom.

Electron Pairs

Two electrons occupying the same orbital in an atom or molecule, typically forming a covalent bond between atoms.