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biology stack 2
| Question | Answer |
|---|---|
| what does figure 13-1 show | a restriction enzyme cutting different sequences of dna |
| Analyzing DNA be gel electrophoresis allows researchers to | identify similarities and differences in the genomes of different kinds of organisms |
| Which of the following techniques do scientists use to make many copies of a gene? | polymerase chain reaction |
| Genetic engineering usually involves | all the above |
| Which of the following are NOT used to read DNA sequences? | double stranded DNA molecules |
| A recombinant plasmid gets inside a bacterial cell by | transformation |
| Which of the following is often used as a genetic marker n plasmids? | a gene for antibiotic resistance |
| What has been an advantage of producing transgenic plants? | improving many people's diets |
| Which of the following is a clone? | genetically identical bacteria produced from a single cell |
| what kind of cell or cells were used to make dolly | body cell & egg |
| which of the following are shown in a karyotype | all of the above |
| what is the approximate probability that a human offspring will be a female? | 50% |
| a pedigree CANNOT be used to | none of the above |
| a person who had PKU inherited: | the allele for the trait from both parents |
| which of the following genotypes result in same phenotype | IBIB and IBi |
| a change in a single gene causes the protein called CFTR to | fold improperly |
| chromosome 21 and 22 contain long stretches of repetitive DNA, which are: | unstable sites where rearrangements can occur |
| Colorblindness is more common in males than in females because? | the allele for colorblindness is recessive and located on the X chromosome |
| a barr body is | a condensed X chromosome that is inactive |
| because the X chromosome contains genes that are vital for normal developement , no baby has been born | without an X chromosome |
| what combination of sex chromosomes represent a female? | XX |
| the process of DNA fingerprinting is based on the fact that: | no two people, except identical twins, have exactly the same DNA |
| The human genome was sequenced: | by looking for overlapping regions between sequenced DNA fragments |
| what is the first step in gene therapy? | identifying the fault gene that causes the disease |
| charles darwin observed | somewhat similar species with traits that suited particular environment |
| one of the adaptions that darwin noted was | differences in shell markings |
| darwin began to formulate his concept that | observations of many species and their geological locations |
| one scientist who attempted to explain rock layers | James Hutton |
| lamarck proposed that organisms | have an innate tendency toward complicity and perfection |
| LMARACK'S THEORY OF EVOLUTIONS includes | the actions of organisms as they use body structures |
| war could prevent endless growth | by Malthus |
| when charles darwin returned from the voyage of the beagle, he | wrote about his ideas but waited many years to publish them |
| when lions prey on a herd of antelopes, some antelopes are killed and some escape. which part of darwins concept of natural selection might be used to describe this situation? | survival of the fittest |
| according to darwins theory of natural selection, the individual that tend to survive are those that have | varaitions best suited to the environment |
| darwins concept of evoulution was not influenced by | knowledge about the structure of DNA |
| modern sea star iarvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates | common ancestor |
| charles darwin viewed the fossil record as | record of evolution |
| darwins theory of evolution is based on the ideas of | natural variation and selection |
| which concept is NOT included in theory of evolution | transmission of acquired characteristics |
| what all members of a population share | members of the same species |
| Which statement about gene pools is typically true? | They contain two or more alleles for each gene |
| its relative frequency is | 25 % |
| most heritable differences are due to | gene shuffling during gamete formations |
| chromosomes during meiosis as well as | crossing over |
| a single-gene trait that has 2 alleles and that shows a simple dominant result in | 2 phenotypes |
| when individual at only one end of a bell shaped curve | directional selelction |
| when individual with an average form of a trait result is | stabilizing selection |
| genetic drift occurs in populations that are | small |
| the type of genetic drift thats follows colonization | founder effect |
Created by:
shannonrayy