If your parents are heterozygous for a gene, what is the chance that you will have at least one copy of it?
A) 0% B) 75% C) 25% D) 50%
Answer: B
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True or false? _____ Mutations always result in negative effects on the organism. _____ Mutations are always large-scale (e.g., involving at least 10,000 base pairs of DNA)
DNA). _____ Mutations are never large-scale (e.g., involving at least 10,000 base pairs of DNA). _____ Most mutations are caused by an environmental pollutant. _____ Mutation rates are constant in all organisms. _____ Mutation rates are higher in men than in women because men have higher metabolic rates than women. _____ Mutation occurs every time a cell divides. _____ All mutations provide genetic variation on which evolution may act. What will be an ideal response?
Non-enveloped and enveloped viruses both may enter the host via endocytosis
Indicate whether this statement is true or false.
What are tree rings? How can they be used to map changes in weather?
What will be an ideal response?
DNA is associated with proteins, forming a complex called:a
chromosomes. b. nucleoli. c. nucleus. d. genes. e. chromatin.