A couple who does not have cystic fibrosis but are both heterozygous has already had three girls with cystic fibrosis,

and are hoping to have a normal child for their fourth. What are the chances that the fourth child will be a normal male?
a. 0
b. 1/8
c. 1/4
d. 3/8
e. 1/2


d

Biology & Microbiology

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People with type A blood have red blood cells that express one type of recognition protein, while those with type B

blood express a different recognition protein. People with AB blood express both recognition proteins. Why can a person with AB blood receive blood from a person with type A, but a person with type A blood cannot received blood from a person with type AB?

What will be an ideal response?

Biology & Microbiology

Ultimately, for aerobic organisms, where does

the energy in ATP come from?

a. glucose b. pyruvate c. water d. NADPH e. sunlight

Biology & Microbiology

Proteins leaking out of damaged body cells activate ____, which results in a cascade of reactions that enhance

phagocytosis of damaged cells by white blood cells.

a. complement proteins b. inflammatory proteins c. PAMPs d. viral DNA e. killer T cells

Biology & Microbiology

Aerobic respiration, anaerobic respiration, and fermentation:a

are endergonic pathways. b. release free energy. c. require oxygen. d. are also known as organismic respiration. e. are anabolic pathways.

Biology & Microbiology