The archaea include which of the following?
a. extreme thermophiles
b. alga
c. protista
d. animals
e. plants
ANSWER: a
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A haploid structure contains __________________, and a diploid structure contains _______________
A. one set of chromosomes (1n); two sets of chromosomes (2n) B. three sets of chromosomes (3n); two sets of chromosomes (2n) C. two sets of chromosomes (2n); one set of chromosome (1n) D. one set of chromosomes (1n); three sets of chromosomes (3n)
____ in angiosperms occurs when a sperm cell "fertilizes" a diploid (2n) cell within the future seed (eventually forming a triploid (3n) endosperm), and a second sperm fertilizes a haploid (1n) egg
Fill in the blank with the appropriate word.
Which choice best describes the main idea behind using the lod method to determine if genes are linked?
1.Linked genes that are farther apart are more likely to be separated by crossing over, so genetic map units are derived from recombination frequencies. 2.The lod score is the log10 of the ratio of the two probabilities that results are either consistent with linkage or that they are not. 3.Software is used to calculate the probability, or lod score, that the observed frequency of recombination is consistent with linkage. 4.One lod map unit is equal to a 10% frequency of recombination.
Where would we expect to find electrical synapses?
A) within the brain B) within the heart C) within the spinal cord D) between interneurons and motor neurons