Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes death, so individuals who have this condition are all heterozygotes
If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia? A) 0%
B) 50%
C) 75%
D) 100%
B
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Each of the following statements about chemoorganotrophs is true EXCEPT
A. They may use substrate-level phosphorylation to produce ATP. B. They may use oxidative phosphorylation to produce ATP. C. They may use photophosphorylation to produce ATP. D. They utilize an electrochemical gradient.
Based on what you know about the principle of parsimony, which of the following is most likely a synapomorphy of conifers and flowering plants?
Given the following cladogram and list of characteristics:
A. Chlorophylls a and b
B. Vascular tissue.
C. Seeds.
D. Flowers.
E. Both chlorophylls a and b and seeds.
Unlike most enveloped viruses, herpes viruses involve the host ________ membrane in the formation of their envelope.
A. mitochondrial B. nuclear C. plasma D. None of the choices are correct.
Histone acetyltransferases are directly involved in which of the following?
A. Removal of histones from chromatin B. Movement of nucleosomes C. Chemical modification of histones D. Termination of gene expression E. Insertion of variant histone proteins