Looking at the figure above, indicate which of the following is true:
a. ‘Fish' is not a monophyletic group.
b. ‘Fish' is a monophyletic group.
c. ‘Tetrapod vertebrates' is a monophyletic group.
d. A and C.
D
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What observation first suggested that H2A and H2B formed heterodimers?
What will be an ideal response?
Genes A and B are on the same chromosome. The genes have alleles A and B on one homologous chromosome, and the alleles a and b on its paired homolog. How could an individual with this allele arrangement produce a gamete with a chromosome containing the alleles Ab or aB?
A. mitosis B. fragmentation of the chromosome C. random fertilization D. independent assortment E. crossing-over
Select the correct sequence of vertebrate development beginning with fertilization.
A. fertilization ? cleavage ? gastrulation ? neurulation ? organogenesis ? neural crest formation B. fertilization ? gastrulation ? cleavage ? neurulation ? neural crest formation ? organogenesis C. fertilization ? neurulation ? gastrulation ? organogenesis ? neural crest formation ? cleavage D. fertilization ? gastrulation ? neurulation ? neural crest formation ? cleavage ? organogenesis E. fertilization ? cleavage ? gastrulation ? neurulation ? neural crest formation ? organogenesis
What proteins are bound to enhancers, forming a protein "bridge" that bends the DNA over the promoter to initiate transcription?
What will be an ideal response?