How do fossils provide evidence of evolution? How are scientists able to determine the age of fossils? What will be an ideal response?
Concepts to Consider: Fossils show the transitional forms between extinct and extant forms; carbonbased
fossils of recent times may be dated using carbon-14; older fossils are typically dated using
potassium-40.
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Recombination frequency for two genes is a function of
a. the distance between the two genes on a single chromosome. b. the overall size of the chromosome where the genes are located. c. the distance between the two chromosomes that each have one of the two genes. d. the relative sizes of the two chromosomes that each have one of the two genes. e. the sex of the parent that supplies each gene.
Heart excitation originates in the
a. atrioventricular node. b. intercalated disk. c. sinoatrial node. d. pericardium. e. endocardium.
The DNA sequence below encodes the first five amino acids of a large protein. 5? ATGTTAGGATATCAG 3? 3? TACAATCCTATAGTC 5? a. Identify the coding and template strands. b
Write the sequence and polarity of the mRNA transcript produced by this sequence. Where does this process occur in eukaryotes? c. Write the amino acid sequence of the amino acids produced using the three-letter code for amino acids. (See genetic code table in text.) Where does this process occur in eukaryotes?
Which single physical feature is most often associated with a 47,XXX karyotype?
A. Infertility B. Large breasts C. Female pattern baldness D. Height greater than siblings