Many cancers have a mutation that changes a valine to a glutamic acid in the RAF kinase protein which phosphorylates proteins that promote cell division. This mutant protein is a constitutively active kinase. What type of allele is this mutant allele?
A) hypomorphic allele
B) hypermorphic allele
C) null allele
D) antimorphic allele
B) hypermorphic allele
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For a gene with two alternative alleles, A (with a frequency of p) and B (with a frequency of q), the term in the algebraic form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is
A. p2. B. q2. C. 2pq. D. (p+q)2. E. 2Aa.
Salmon are well known for their ability, after growing to maturity in the ocean, to find their way back to the streams where they were born in order to breed. For this kind of navigation, they likely:
A. use magnetotaxis only. B. use map information only. C. rely on kinesis only. D. use a variety of environmental cues. E. use only a combination of magnetotaxis and kinesis.
A root hair is an extension of an endodermal cell
____________________ Indicate whether the statement is true or false.
Prokaryotic cells may possess _____ that attach them to surfaces.
Fill in the blank(s) with the appropriate word(s).