Assume that a trait is caused by the homozygous state of a gene that is recessive and autosomal. Nine percent of the individuals in a given population express the phenotype caused by this gene
What percentage of the individuals would be heterozygous for the gene? Assume that the population is in Hardy-Weinberg equilibrium.
42 percent
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Based on phosphate transfer potential, which is more likely to happen?
A. Phosphoenolpyruvate will transfer phosphate to ADP B. ATP will transfer phosphate to phosphoenolpyruvate C. There will be no phosphate transfer between these molecules
The change from indirect development to direct development in sea urchins illustrates the following concepts: (choose all that apply)
_____ Differences in gene expression patterns can cause major changes in development. _____ An organism can arrive at the same adult body plan in different ways. _____ Changing the mode of development requires evolving a lot of new genes. _____ Urchins have a unique genome that is especially suited to major developmental changes. _____ Once a lineage evolves a mode of development, it becomes “locked in”. _____ Radially symmetric organisms are subject to different evolutionary pressures than bilateral organisms. _____ Chromosomal deletions have major effects on development.
You sample a population of butterflies and find that 56% are heterozygous at a particular locus. What should be the frequency of the recessive allele in this population?
A) 0.08 B) 0.09 C) 0.70 D) Allele frequency cannot be determined from this information.
What is the central purpose of aseptic technique?
A) To identify pathogenic bacteria B) To prevent the spread of contamination C) To cure disease D) To find new antibiotics