A man and his sister are both affected with a mitochondrial disorder. Because the sister has two children who also have the disorder, the man is concerned about the possibility of also having children with the disorder. What is the estimated risk for each pregnancy of this man producing a child with the same mitochondrial disorder that he has if his wife does not have a mitochondrial disorder?

A. 100%
B. 50%
C. 25%
D. 0%


D) 0%

Biology & Microbiology

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The gaining of electrons is referred to as ____

Fill in the blank with the appropriate word.

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The series of events from infection of one cell through the release of progeny phages from broken,

open, or lysed cells is called

a. lytic cycle. b. lysogenic cycle. c. Krebs cycle. d. citric acid cycle. e. lytic or lysogenic cycle.

Biology & Microbiology

Which condition does not involve a defect in an enzyme pathway?

A) Alkaptonuria B) Albinism C) Sickle cell anemia D) Phenylketonuria (PKU)

Biology & Microbiology

Which type of soil will supply nutrients to plants while its acidity leaches minerals from rock?

A. humus B. sand C. clay D. loam

Biology & Microbiology