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Genetics

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Who discovered the structure of DNA? A) Pauling B) Watson and Crick C) Franklin D) Hershey and Chase
After replication, ______. A) each new DNA double helix consists of two old strands B) each new DNA double helix consists of one old strand and one new strand C) each new DNA double helix consists of two new strands D) one new DNA double helix consists of two old strands and the other new DNA double helix consists of two new strands
Shared fundamental features at the level of molecular function and cell organization indicate that organisms came from a common ancestor.
A______mutation originates during meiosis while a _______ mutation originates during mitosis.
Insertions or deletions of single nucleotides are likely to?
A spontaneous mutation usually originates as an error in
Mutational hot spots are sites in the DNA where a mutation is most likely to occur that can cause a change in protein structure
Consider the following base sequence:OriginalACGGATTCATTATATGCCTAAGTAATATMutatedACGGTTCATTATATGCCAAGTAATATWhat kind of mutation has occurred?
What is one possible reason why mutation rates are lower in multicellular organisms than in single celled organisms?
What would happen if a frameshift mutation causes a stop codon to be inserted into a DNA sequence?
How many base-pairs would have to be deleted in a mutational event to eliminate a single amino acid from a protein and not change the rest of the protein?
Match the mutation type with its descriptionA base change resulting in a codon specifying the same amino acid as found in the normal polypeptide (D)A base change resulting in a codon specifying a different amino acid from that found in the normal polypeptide. (A)A base change resulting in a stop codon being inserted somewhere in the normal polypeptide. (B)A mutation in which a single base pair is replaced by a different base pair (C)
Match the example given to the type of selection mechanism that the example represents. Answers may be used more than once or not at all.- An African butterfly species exists in two strikingly different color patterns (A)- Brightly colored male peacocks mate more frequently than drab ones do (D)- Most Swiss starlings produce four to five eggs in each clutch (B)- Fossil evidence indicates that horses have gradually increased in size over time (C)- The average birth weight for human babies is about 7.5lbs (E)- A certain species of snail exists as either of a cream colored or a solid brown color. Intermediate colors are rare. (A) - Pathogenic bacteria found in many hospitals are antibiotic resistant (C)
Genetic drift results in selection for individuals that are better adapted to their environments.
Sexual selection can be so strong that it selects for traits that are actually detrimental to the individual's survival.
Geographic isolation is a factor in sympatric speciation but not in allopatric speciation.
New alleles, and thus new traits are the result of?adaptations to environmental changesmutations in genesgenetic recombination during reproductionAll of the choices are correct.
If an allele is fixed in a gene pool, then all individuals in the population are homozygous for that allele.
In many populations there is more variance in the reproductive success of the females than there is of the males.
Members of two different species possess similar a looking structure that they use in a similar fashion to perform the same function. Which information would shed the most light on whether these structures are homologous or the result of convergent evolution?

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