A testcross with a heterozygous dominant individual will yield only heterozygous dominant offspring
Indicate whether the statement is true or false
FALSE
Explanation: AA × aa → AA : aa in a 1:1 ratio.
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The microbiologist receives a sputum specimen that upon preliminary Gram staining review of direct smear, contains numerous squamous epithelial cells and an excessive amount of contami-nating normal flora. Based on the microbiologists knowledge, the microbiologist rejects the spe-cimen and requests a new sample. The physician insists that the microbiologist culture the sample as received. The
microbiologist should: a. disregard the physicians request and dis-card the specimen. b. notify their supervisor and write-up the physician. c. set-up the culture as ordered noting the lack of specimen integrity that may com-promise culture results. d. the microbiologist should have not called the physician and process the sample as received.
What structural component in skeletal and cardiac muscle conducts action potentials from the outer surface of the muscle fiber inside to the myofibrils?
A. actin B. tropomyosin C. troponin D. transverse tubule E. None of these.
Ion concentration differences produce an action potential creating a signal. The difference between a weak signal and an intense signal is
A. weak stimuli only open sodium gates, strong signal also open potassium gates. B. the frequency at which an axon fires. C. the action potential is graduated and a weak signal causes a small change in polarity. D. a strong signal does not allow repolarization but sends a constant flow of ions. E. All of the choices are correct.
Suppose you cross a pea plant with yellow, smooth seeds with one that has green, wrinkled seeds
You examine the seeds of 967 offspring and find that some have yellow, smooth seeds and some have yellow, wrinkled seeds, but no green seeds of either type show up. What is the genotype of the yellow-seeded parent? (Y = yellow, y = green; S = smooth, s = wrinkled) A) YYSS B) YySS C) YySs D) YYSs E) YYss