How many chromosomes would be found in the karyotype of a Down syndrome female?

A) 44
B) 45
C) 46
D) 47


D

Biology & Microbiology

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The diagram shows a generalized cross section of the marine environment with various zones labeled with letters

Which zone has a condition of constant temperature? A) A B) B C) C D) D E) E

Biology & Microbiology

You isolate a new bacterium from soil with a revolutionary new growth technique. You are interested in characterizing the genome of this organism using restriction enzymes. The first enzyme chosen should be one that will cut the genome infrequently, allowing you to do more detailed fine mapping at a later date. Of the following choices, the best enzyme to choose for your task would be (NOTE: P =

a purine base; Y = a pyrimidine base) A) HpaI (CCGG). B) TaqI (TCGA). C) EcoRI (GAATTC). D) HindII (GTYPAC). E) NotI (GCGGCCGC).

Biology & Microbiology

Which of the following is true about polio?

a. it is an X-linked genetic disease b. it has been virtually eliminated worldwide c. it is a disease that kills motor neurons d. it most frequently affects adults e. all of these are true about polio

Biology & Microbiology

An infectious circular piece of RNA that can infect plants is called a ________

A) virus B) prion C) viroid D) capsid

Biology & Microbiology