In eukaryotic cells, which of the following can occur during the stages of mitosis?
A) Replication of DNA
B) Duplication of chromatids
C) Synapsis and crossing over
D) Fragmentation and disappearance of nuclear envelope and nucleolus
E) All of these
D
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Small, nonterritorial male marine iguanas typically have their mating interrupted by larger males prior to ejaculation. What alternative mating strategy have these small males developed to compensate for this?
A) Small males form coalitions and distract larger males to allow enough time for copulation. B) Small males induce ejaculation prior to copulation, and store the ejaculate in their cloacal pouches. C) Small males have developed the ability to induce ejaculation much more quickly than large males. D) Small males have developed sperm that are more efficient at fertilization than the sperm of larger males.
In peas the trait for tall plants is dominant (T) and the trait for short plants is recessive (t). The trait for yellow seed color is dominant (Y) and the trait for the green seed color is recessive (y). A cross between two plants results in 296 tall yellow plants and 104 tall green plants. Which of the following are most likely to be the genotypes of the parents?
A. TTYY x TTYY B. TTyy x TTYy C. TtYy x TtYy D. TtYy x TTYy E. TtYY x Ttyy
An example of a latent viral infection is
A) subacute sclerosing panencephalitis. B) cold sores. C) influenza. D) smallpox. E) mumps.
Homology is the evidence of binomial nomenclature.
a. true b. false