Which statements would the nurse educator evaluate as indicating a student's need for additional instruction on trisomic rescue?
Note: Credit will be given only if all correct choices and no incorrect choices are selected.
Standard Text: Select all that apply.
1. "Trisomic rescue occurs when the extra chromosome is isolated and lost."
2. "The effect of trisomic rescue depends on when it occurs."
3. "In somatic cells it is best for trisomic rescue to take place later rather than earlier."
4. "In sex cells it is best for trisomic rescue to take place sooner rather than later."
5. "Trisomic rescue can be induced through ionizing radiation."
1,2,4
Rationale 1: If the extra chromosome is not included in formation of a new cell and is isolated and lost, the result is a cell with the normal 46 chromosomes.
Rationale 2: How early or late trisomic rescue takes place determines the outcome.
Rationale 3: If trisomic rescue occurs early, the abnormal chromosomal content will be decreased.
Rationale 4: If trisomic rescue occurs early, the abnormal chromosomal content will be decreased.
Rationale 5: There is no known way to induce trisomic rescue.
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