Males more commonly are affected by Xlinked
recessive genetic disorders than are
females because
a. females have two X chromosomes and thus
less of a chance to be recessive.
b. males have only one X and thus more of a
chance to be recessive.
c. males have only one X, they have multiple
alleles for each gene.
d. Y chromosomes cause X gene mutations.
e. males are weaker genetically than females
B
You might also like to view...
Which blood vessel will deliver blood from the lower regions to the body?
a. Pulmonary artery b. Ventricle c. Superior vena cava d. Inferior vena cava e. Pulmonary vein
Climate
a. changes with the seasons. b. refers to the atmospheric conditions at a particular place at a particular time. c. is determined by temperature and availability of water. d. is determined by the organisms living in a particular area. e. is the same throughout the globe.
Figure 4.16
What is a main function of the structure in the accompanying figure labeled B?
A. It controls cell shape. B. It separates DNA during cell division. C. It helps nerve cells lengthen. D. It is found in hair. E. It helps regulate DNA replication.
Which of the following birds has a beak adapted for straining vegetation from water?
A. Robin B. Duck C. Vulture D. Kingfisher E. Eagle