Red-green color blindness is controlled by an X-linked gene in humans. The allele that causes color blindness is recessive to the allele for normal vision. A man and woman both with normal vision had color-blind fathers. If this man and woman have a child, what is the probability that the child will be color blind?

A) 1/2
B) 1/4
C) 1/8
D) 1/3
E) 0


B) 1/4

Biology & Microbiology

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The meninges are four chambers in the brain that are filled with cerebrospinal fluid, which circulates through them to protect the brain.

a. true b. false

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a. nucleic acids and proteins. b. alcohols and lipids. c. oligosaccharides and alcohols. d. ketones and aldehydes. e. oligosaccharides, proteins, and lipids.

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The Gram-positive diplococcus ________ is commonly found in the pharynx but may invade the central nervous system inside cells where it survives after endocytosis

A) Streptococcus agalactiae B) Listeria monocytogenes C) Haemophilus influenzae D) Neisseria meningitidis E) Streptococcus pneumoniae

Biology & Microbiology