In his monohybrid crosses, Mendel deduced that one trait was recessive because that trait was ____
a. not present in the F1 and did not reappear in the F2
b. present in the F1 and in the F2
c. not present in the F1 and reappeared in the F2
d. present only in the parents
e. present only in the F2
ANSWER: c
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Traditionally, classification of fungi has been based on
a. DNA sequences. b. body type. c. mode of feeding. d. whether the fungus is a saprobe, parasite, or in a mutual symbiosis. e. structures that release sexual spores.
Most animals show ____ symmetry
a. bilateral b. multilateral c. no d. radial e. unilateral
The seed develops from the ____
a. gametophyte b. ovary c. ovule d. pollen grain e. zygote
Which disorders can be caused by inbreeding?
a) albinism—a genetic disorder that causes the absence of skin pigment b) bone fracture—an injury to the bones from a fall or an accident c) flu—a disease caused by a virus d) hemophilia—a genetic disorder that prevents blood from clotting e) vertigo—a sensation of things spinning