In humans, an X-linked disorder called coloboma
iridia (a fissure in the iris) is a recessive trait. A
normal couple has an afflicted daughter. The
husband sues the wife for divorce on the grounds of
infidelity. Would you find in his favor? What will be an ideal response?
Answer: Yes, the daughter would have to inherit the recessive
trait from both parents.
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A test cross of an organism of unknown genotype is done when the organism is crossed to an organism that is:
A. a heterozygote. B. a dominant homozygote. C. a recessive homozygote. D. All of the answer options are correct.
Genes located along the X chromosome:
A. have a full set of complementary alleles on the Y chromosome. B. are called X-linked genes. C. are contributed solely by the female parent. D. are always recessive to genes located on the Y chromosome.
Which of the following must occur prior to the others in infecting a cell?
a. penetration. b. adsorption. c. uncoating. d. replication.
An individual transport vesicle________
(a) contains only one type of protein in its lumen. (b) will fuse with only one type of membrane. (c) is endocytic if it is traveling toward the plasma membrane. (d) is enclosed by a membrane with the same lipid and protein composition as the membrane of the donor organelle.