Phenylketonuria is an inherited disease caused by a recessive autosomal allele. If a woman and her husband are both carriers, what is the probability that their first child will be a phenotypically normal girl?

A) 1/4
B) 1/16
C) 3/16
D) 3/8


D

Biology & Microbiology

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Research by Christopher Cullis has shown that ____

a. the genome size of plants varies little between species b. the genome size of individual plants of the same species is constant c. a plant’s environment can act as a selective agent to establish advantageous variants, but these variants cannot be transmitted to the next generation d. a plant’s environment can act as a selective agent to establish advantageous variants, and these variants can be transmitted to the next generation e. the genome size of plants is related to plant size

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Which of the following is a common cause of

interrupted breathing? a. sleep apnea b. lung cancer c. high altitude sickness d. low red blood cell count e. none of these

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Which of the following contain enzymes used in the

breakdown of glucose and generation of ATP? a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. endoplasmic reticula

Biology & Microbiology