Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. This couple also has a child who does not have CF. What is the probability the unaffected child is heterozygous?
A) 1/4 B) 1/3 C) 2/3 D) 1/2 E) 3/4
Answer: D
Biology & Microbiology
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One element that does not cycle into the atmosphere is phosphorus
____________________ Indicate whether the statement is true or false.
Biology & Microbiology
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What will be an ideal response?
Biology & Microbiology
A human fecal sample is examined and found to contain a few strobila. The person is probably infected with
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Biology & Microbiology