Heterozygotes for the Tay-Sachs disease allele appear to have greater than normal resistance to
____________________. Fill in the blank(s) with the appropriate word(s).
ANS: tuberculosis
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____ will inhibit the ability of pathogens to infect other cells.
What will be an ideal response?
A covalent bond is formed as the result of
a) tranferring electrons b) sharing an electron pair c) transferring protons d) sharing a proton pair
Which of the following occurs during the Calvin cycle of photosynthesis?
A) Chlorophyll acts as an enzyme, but only in the dark. B) Carbon dioxide is converted to chemicals that can be used to make sugars. C) Nothing occurs because the plant rests in the dark. D) Water is converted to its most basic elements, hydrogen and water.
In a cross between two heterozygous plants (Tt x Tt), what is the probability of a plant being homozygous given that it is tall?
a. 3 b. 1 c. 0.55 d. 0.33