Which of the following causes the unwinding of the DNA double helix?
a. DNA polymerase
b. DNA helicase
c. RNA primer
d. primosome
e. RNA polymerase
b
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Why is sexual reproduction sometimes preferable to asexual reproduction?
a. increased genetic diversity b. fewer raw materials needed c. less energy required d. More than one of these answers is correct.
During early interphase the structure of a eukaryotic DNA chromosome is
A) a single continuous linear double helix. B) a double helix undergoing semiconservative replication. C) a double helix undergoing conservative replication. D) single-stranded.
The length of monkey flower leaves is inherited as an incomplete dominant trait. When long leaves are crossed with short leaves a third phenotype, intermediate leaves, is produced. A plant breeder crosses two monkey flowers. The resultant offspring are 58 intermediate and 52 short-leafed plants. What are the phenotypes of the parent monkey flowers? Explain your answer
What will be an ideal response?
Analysis of mitochondrial DNA from different species of stickleback fish in three lakes disproves the hypothesis of a
common ancestor for all three species. __________________ Indicate whether the statement is true or false.