Consider the pedigree below. The trait seen in the black-shaded individuals most likely is a _______ trait.
A: Dominant, autosomal
B: Dominant, X-linked
C: Dominant, Y-linked
D: Recessive, X-linked
Answer: B: Dominant, X-linked
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If you touch a hot stove and burn your hand, the pain isn’t actually in your hand—it’s in your head. What evidence can you provide to substantiate this claim?
A. A reflex arc allows the quick response between the hand and the brain; no interpretation occurs. B. Sensory neurons and interneurons carry the heat sensation to the brain where it is interpreted as painful. C. Motor neurons pull your hand away from the flame, signaling pain to the brain. D. Interneurons form connections directly from the burned receptor molecules to the brain.
In a flower, an anther is typically at the tip of a(n) ____
a. calyx b. receptacle c. carpel d. filament e. ovule
Crossing over
a. generally results in binary fission. b. involves nucleoli. c. involves breakages and exchanges being made between sister chromatids. d. alters the composition of chromosomes and results in new combinations of alleles being channeled into the daughter cells. e. is the same as disjunction.
The lymph from the right foot empties into the
a) left axillary artery b) lumbar trunk c) jugular vein d) right lymphatic duct e) thoracic duct