In rabbits, spotted coat (S) is dominant to solid color (s) and black (B) is dominant to brown (b). A true-breeding black spotted rabbit is mated to a true-breeding brown solid rabbit to produce a heterozygous F1 generation. Two F1 individuals are mated, and you do not see a 9:3:3:1 (black spotted: black solid: brown spotted: brown solid) ratio of offspring, but instead see that almost all offspring are a non-recombinant phenotype. This tells you that
A. that fur pattern (spotted vs. non-spotted) and fur color are maternally inherited.
B. that the genes for fur pattern (spotted vs. non-spotted) and fur color assort independently.
C. that the genes for fur pattern (spotted vs. non-spotted) and fur color are on different chromosomes.
D. that the genes for fur pattern (spotted vs. non-spotted) and fur color are on the same chromosomes.
E. that the genes for fur pattern (spotted vs. non-spotted) and fur color are epistatic.
Answer: D
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If you found a mutation, involving the loss of two bases, which was present in humans living on all four continents which you could test but was absent in close relatives such as gorillas and chimps, what would this imply?
A. Two bases were actually insertions in the nonhuman primates. B. Deletion arose before the branch between humans and nonhuman primates. C. Deletion arose in multiple nonhuman primates. D. Deletion arose at least six times in different human populations. E. Deletion arose after the branch between humans and nonhuman primates.
Biogeochemical cycles are crucial to ecosystem function because __________.
Fill in the blank(s) with the appropriate word(s).
An advantage of YACs over other vectors in cloning human genes is that they ____
a. are taken up more readily by recipient cells b. have a higher capacity for carrying long DNA fragments c. are less likely to trigger cell rejection d. resemble a human chromosome more closely than do other vectors e. carry long regions of human-like DNA
Some joints, such as those joining the bones of the skull, are immobile and do not allow the two bones involved to move
Indicate whether the statement is true or false