If a healthy young couple are both carriers of cystic fibrosis, the chance that each of their future children will inherit this serious illness is
a) 0%, because cystic fibrosis is not an inherited illness.
b) 25%.
c) 10%.
d) 50%.
e) 100%.
Ans: b) 25%.
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Somatic cell nuclear transfer
a. uses differentiated cells. b. uses stem cells. c. produces human embryos for research d. is used to breed livestock e. does all of these.
Amphibians appeared on land about:a
543 million years ago. b. 450 million years ago. c. 420 million years ago. d. 250 million years ago. e. 65 million years ago.
Because it secretes substances into ducts that connect to the duodenum, the pancreas acts as an ____ gland of the digestive system
Fill in the blank with the appropriate word.
The above disease condition shown in this
photograph is caused by which of the following? a. trematodes b. Tricinella c. Wuchereria bancrofti d. hookworms e. none of these