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Use this information for the following  two questions.  Pea plants with the genotype RrYy are crossed with others that have the genotype Rryy. The resulting phenotypes were observed in 32 offspring: 20 round (R) and yellow (Y), 6 round and green (y), 1 wrinkled (r) and yellow, and 5 wrinkled and green. 

You just assisted with the elective endotracheal intubation of a child with respiratory failure and a perfusing rhythm. Which provides a reliable, prompt assessment of correct endotracheal tube placement in this child?

A 6-year-old is found unresponsive, not breathing and pulseless.  What is the correct compression-to-ventilation ratio when 2 or more healthcare providers are present to perform CPR?

You find a 9-year-old boy to be unresponsive. You shout for help, and after finding that he is not breathing and has no pulse, you and a colleague begin CPR. Another colleague activates the emergency response system, brings the emergency equipment, and places the child on a cardiac monitor/defibrillator, which reveals ventricular tachycardia. You attempt defibrillation at 2 J/kg and give 2 minutes of CPR. The rhythm persists at the second rhythm check, at which point you attempt defibrillation with 4 J/kg. A fourth colleague arrives, starts an IV, and administers 1 dose of epinephrine 0.01 mg/kg. If ventricular fibrillation or pulseless ventricular tachycardia persists after 2 minutes of CPR, you will administer another shock. Which drug and dose should be administered next?

While you are performing CPR on an infant in cardiac arrest at the doctor’s office,  a second resuer arrives with an AED. Which of the following, best describes the use of an AED

You need to provide rescue breaths to a child victim with a pulse. What is the appropriate rate for delivering breaths?

What is the standard error for Group C?  

A 10-month-old infant boy is brought to the emergency department. Your initial assessment reveals a lethargic, pale infant with slow respirations and slow, weak central pulses. One team member begins ventilation with a bag-mask device with 100% oxygen. A second team member attaches the monitor/defibrillator and obtains vital signs while a third team member attempts to establish IV/IO access. The patient’s heart rate is 38/min. The infant’s blood pressure is 58/38 mm Hg, and capillary refill is 4 seconds. His central pulses remain weak, and distal pulses cannot be palpated. Chest compressions are started and IO access is obtained. Which medication do you anticipate will be given next?

Use this information for the next three questions. Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The frequency of the TT genotype is 0.56.   What would be the expected frequency of the heterozygotes?

A 3-year-old child is unrespnsive. not breathing, and pulseless.  High-quality CPR is in progress.  A cardiac monitor is applied, and the rhythm below is noted. ekg vt.png  What is the next appropriate intervention?