Both sickle cell and hemophilia
a. are sex-linked traits
b. are seen in homozygous dominant individuals
c. provide resistance to malaria infections
d. are caused by genes coding for defective proteins
Ans: d. are caused by genes coding for defective proteins
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In the case of T-even phages, the burst size is about
A. 1 per host cell. B. 5 per host cell. C. 200 per host cell. D. 1,000 per host cell.
Nonsteroid hormones bind to receptors on the target cell’s ___________________. Fill in the blank(s) with the appropriate word(s)
When the atoms involved in a covalent bond have the same electronegativity, what type of bond results?
A) an ionic bond B) a hydrogen bond C) a nonpolar covalent bond D) a polar covalent bond
What happens to the body parts, according to the principle of use and disuse?
a. Body parts grow in proportion to their biogeographic location. b. Body parts grow in proportion to the needs of natural selection. c. Body parts grow in proportion to how much they are used. d. Body parts grow in proportion to how much they are not used.