What common condition is caused by the presence of three copies of chromosome 21?

Explain how oxygen and nutrients are transported by ocean currents

Which of these processes occurs when u inhale? A) the diaphragm expands And thoracic volume decreases. B) the diaphragm contracts and thoracic volume decreases. C) the diaphragm expands and thoracic volume increases.

When a population is split into smaller group, why do these groups develop different traits?

Predict the effect if injuries to the brainstem, cerebral cortex, cerebellum

Every 3 letters in the messenger RNA (mRNA) codes for what?

What are two generalizations you could make about the spread of enlightenment ideas?

The second stage of catabolic metabolism occurs in the A. cell membrane. B. ribosomes. C. cytosol. D. mitochondria.

Melissa is getting ready for a party where she plans to serve grilled chicken and a raw vegetable salad.

What pattern of inheritance does this pedigree chart represent? (squares are male/circles are females a. y-linkedB) x-linked dominant traitsC) x-linked recessive traitsD) autosomal recessive traits

Which term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell?