How can you explain the fact that protein synthesis proceeds normally in mammals in which not all mitochondrial tRNAs are encoded in mitochondrial DNA?
What will be an ideal response?
In some mammalian species, some of the mitochondrial tRNAs are encoded by nuclear genes. The tRNAs are imported into the mitochondria.
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True or False: if an energy source such as sunlight is available, the citric acid cycle can run in reverse in some organisms
A. true B. false
Strong selection against the recessive phenotype
a. reduces the equilibrium frequency of the recessive genotype b. completely eliminates the recessive genotype c. has no effect on the recessive genotype
What are the possible phenotypes of the children if the mother's genotype is IAi for blood type and the
father is IBi? (Use the Punnett square to verify your answer.) a. all AB b. A, B c. A, AB d. A, B, O e. A, B, AB, O
Which of the following terms is mismatched with its meaning or characteristics?
A. Eumetazoa: definite symmetry; tissues organized B. Parazoa: lacks symmetry; no tissues C. Diploblastic: ectoderm and mesoderm D. Chordate: animal with notochord E. Triploblastic: ectoderm, mesoderm, and endoderm