Suppose that in some sexually-reproducing species the haploidnumber of chromosomes is 20. How many chromosomes would be ​foundin a somatic cell?
​A) 20​​​​B) 10​​​C) 2​​​D) 40
Anatomically modern humans migrated out of Africa intoneighboring continents. About when did this migration begin?
​A) 1,000 years ago
​B) 10,000 years ago
​C) 60 thousand years ago
​D) Several million years ago
In one type of genetic therapy, healthy cells are introducedinto diseased tissues. Which of the following is a serious problemwith ​this kind of therapy?
​A) It is technically very difficult to transfer cells intotissues
​B) Rejection of the introduced cells by the recipient’simmune system
​C) Since each person’s DNA is unique, the donor DNA may notfunction in the recipient’s tissues
​D) Every person has different cell types
Which of the following is true about the process of crossingover of chromosomes?
​A) It ensures that replication of the chromosomes is aserror-free as possible
​B) It acts to ensure that the gametes that result frommeiosis are all genetically alike
​C) It increases the genetic diversity of gametes by creatingchromosome types that are not identical to any ​​​​​​​​​maternal orpaternal types
​D) It happens during mitosis as well as meiosis
​
Which of the following gives a good idea of what the scienceof genetics is all about?
​A) Genetics tries to establish patterns and mechanisms ofheredity of traits from generation to generation
​B) Genetics tries to work out the rules and processesgoverning overall cellular metabolism
​C) Genetics focuses on mitosis and DNA replication more thananything else
​D) Genetics, unlike other branches of science, does notproceed by the scientific method, since it is nearly impossible todo ​​​​meaningful genetics experiments
Carbohydrates have which 2 main functions in livingthings?
​A) Energy storage and structural uses
​B) Insulation and structural uses
​C) Energy storage and organ cushioning
​D) Structural uses and hereditary information storage
On the right is a diagram of a molecule we have studied.​Which one?
​A) Protein
​B) DNA polymerase enzyme
​C) Messenger RNA
​D) DNA double helix
Why is a genetic mutation in a gamete (reproductive cell, eggor sperm) potentially more consequential than a genetic mutation​in a somatic (body) ​cell?
​A) A mutation in a somatic cell cannot have a bad effect onan organism, while a mutation in a gamete can
​B) A mutation in a gamete can get passed to futuregenerations, while a mutation in a somatic cell cannot
​C) A mutation in a somatic cell has the potential to getpassed on to future generations, affecting not only the organism inwhich it ​​occurs but also descendants. This is not true ofgametes
​D) A mutation in a gamete will always get passed on to futuregenerations, while a mutation in a somatic cell will not
What is the key factor enabling a population to possiblyevolve to form a new species?
​A) It must, for a time at least, not experience any geneticmutations
​B) Reproductive isolation, i.e., the population must notexchange genes with other populations
​C) It must be larger and more fierce than any competingpopulations
​D) It must be a very large population, because evolutionleading to speciation cannot take place in small populations
​
