Knight followed up on attempts of English farmers to improve varieties of agriculture with his studies on garden peas. When he crossed two true-breeding varieties, he found all of the following: Check all that apply.
_____ All the F1 offspring had the dominant trait.
_____ If both parents have the same trait, then all of their offspring will also have that trait.
_____ Some F2 offspring had the dominant trait and some had the recessive trait.
_____ Among the F2 offspring, more had the dominant trait and fewer had the recessive trait.
__X__ All the F1 offspring had the dominant trait.
_____ If both parents have the same trait, then all of their offspring will also have that trait.
__X__ Some F2 offspring had the dominant trait and some had the recessive trait.
__X__ Among the F2 offspring, more had the dominant trait and fewer had the recessive trait.
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Why is DNA resistant to hydrolysis under alkaline conditions?
A. DNA lacks the 3' hydroxyl on the pentose ring, which would have participated in the hydrolysis. B. Deoxyribose forms furanose rings without oxygen, which makes the ring more stable. C. The 2' hydroxyl of the sugar is directly involved in the hydrolysis reaction, and DNA lacks this group. D. The carbonyl of uracil is directly involved in the hydrolysis reaction and DNA lacks this base. E. None of these choices is correct.
Which of the following is NOT associated with
Marfan syndrome?
a. skin lacking elasticity b. loose joints c. weakened aorta d. short stature e. mutated fibrillin gene
Which of the following are found in the nucleus of an atom?
A) electrons and neutrons B) neutrons and protons C) protons and electrons D) neutrons, electrons, and protons
Which of the following best describes the main structural components of a virus?
a) nucleic acid and enzymes b) prophage and nucleic acid c) nucleic acid and protein capsid d) protein capsid and enzymes e) prophage and protein capsid