The Extra 21^st Chromosome That Is Found with Down Syndrome

question 109

True/False

The extra 21^st chromosome that is found with Down syndrome usually comes from the father's sperm.

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Definitions:

Sheets

Thin, broad pieces of material, such as metal, paper, or fabric, used for various purposes.

Pseudopodia

Temporary, foot-like extensions of a cell's surface, used for movement and ingestion by some single-celled organisms.

False Feet

Also called pseudopodia, these are temporary projections of the cytoplasm found in some eukaryotic cells, used for movement and feeding.

Excavate

To remove earth carefully and systematically from an archaeological site to uncover past artifacts or structures.