In pedigree charts, autosomal dominant disorders are expressed in heterozygotes. Therefore, the disorders are typically
A. occur every third generation.
B. appear in every generation.
C. appear only in males.
D. appear only in females.
E. seem to disappear in one generation, only to reappear in the next generation.
B. appear in every generation.
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Organisms that degrade hydrocarbons in crude oil are ubiquitous in the environment and have evolved special strategies, such as surfactant production, that allow them to readily use hydrocarbons as electron donors and carbon sources
Indicate whether the statement is true or false.
The normal functions of Spo11 and Cas9 enzymes are different because
A) Spo11 produces double-strand breaks during meiosis, whereas Cas9 functions during mitosis. B) Spo11 produces site-specific double-strand breaks during meiosis, whereas Cas9 breaks DNA at random genomic locations. C) Spo11 produces double-strand breaks in many genomic locations during meiosis, whereas Cas9 is targeted to specific sequences by a CRISPR RNA. D) Spo11 produces double-strand breaks at sequences targeted by RNAs expressed during meiosis, whereas Cas9 has the ability to recognize DNA sequences without an RNA. E) Spo11 is unique to yeast, whereas Cas9 occurs in most higher eukaryotes.
Describe the lytic and lysogenic bacteriophage replication cycles
What will be an ideal response?
Eutrophication is primarily a result of (agricultural/industrial/urban) runoff.
Fill in the blank(s) with the appropriate word(s).