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- 1. Multiple ChoiceMorgan crossed a pure-breeding wild type red-eyed fly with a mutant white eyed fly, producing an F1 generation of all red eyed flies. When he crossed his red-eyed flies with each other, the F2 generation included both red- and white-eyed flies. However, all the white-eyed flies were male. What explains this result?The gene involved was on the X chromosome.The gene involved was on the Y chromosome.The result is due to multifactorial inheritance.Other male-specific factors (such as hormones) influence eye color in flies.
- 2. Multiple ChoiceThe closer two genes are on a chromosome, the higher the probability that a crossover will occur between them.TrueFalse
- 3. Multiple Choice
What is transformation (with regard to bacteria)?
The bacteria mutates
A plasmid from one bacterium becomes incorporated into another
The bacterium puts on it's cape and becomes a superhero
The bacterium recieves enzymes from another bacterium.
- 4. Multiple Choice
Genetic variation can increase as a result of which of the following processes (select all that apply)
Crossing over
Conjugation
Fertilization
Binary fission
- 5. Multiple ChoiceThe different forms of a genehereditygeneticsgenealleles
- 6. Multiple ChoiceThis trait always shows up in an organism when the allele is presentdominant allelecodominanceprobabilityrecessive allele
- 7. Multiple ChoiceThis trait is hidden whenever the dominant allele is presentdominant allelecodominancerecessive allelePunnett Square
- 8. Multiple ChoiceAn organism's physical appearance or visible traitsfertilizationgenotypephenotypehomozygous
- 9. Multiple ChoiceAn organism's genetic makeup, or allele combinationfertilizationgenotypephenotypeheterozygous
- 10. Multiple ChoiceAn organism that has two different alleles for a trait (hybrid)fertilizationgenotypehomozygousheterozygous
- 11. Multiple ChoiceAn organism that has two identical alleles for a trait (purebred)genotypephenotypehomozygousheterozygous
- 12. Multiple Choice
A male shark has 40 chromosomes in each of its sperm. How many would be present in its body cells?204080160 - 13. Multiple ChoiceUnlike mitosis, meiosis results in the formation of2N daughter cells.haploid cells.body cells.diploid cells.
- 14. Multiple Choice
Which of the following happens during anaphase 1?
Homologous chromosomes line up in the middle.
Sister chromatids are separated.
Homologous chromosomes are separated.
Four daughter cells are formed.
- 15. Multiple ChoiceDuring which stage does crossing over take place?ABCD
- 16. Multiple Choice
What causes genetic variation? Choose ALL that apply.
fertilization
crossing over of chromosomes
random assortment of chromosomes during metaphase
asexual reproduction
- 17. Multiple ChoiceChiasmata are most closely related to which of the following?crossing overfertilizationcytokinesismitosis
- 18. Multiple ChoiceWhen does crossing over occur?InterphaseProphase 1Prophase 2Metaphase 1
- 19. Multiple ChoiceTrisomy is a genetic disorder that ________has three sets of chromosomeshas three copies of a particular chromosomethat is curablenone of the above
- 20. Multiple ChoiceMeiosis results in ______.4 genetically distinct haploid gametes2 genetically distinct cells2 genetically identical cells4 genetically identical cells
- 21. Multiple ChoiceThe chromosomes that pair up during meiosis, are called __________ chromosomes.homozygousasexualhomologousgenes
- 22. Multiple ChoiceThe purpose of meiosis is to form ________ cells.bodysexsomaticbrain
- 23. Multiple ChoiceWhen homologous chromosomes match up, they form a structure call a ___________.tetradtriaddiploidgamete
- 24. Multiple ChoiceCrossing over helps promotemale genotypegenetic variationDNA replicationmitosis
- 25. Multiple ChoiceWhat phase is shown in the picture?anaphase 1anaphase 2metaphase 1telophase 1
- 26. Multiple ChoiceThe two ways to increase genetic variation during meiosis are crossing over and _____SynapsisTetradIndependent assortmentGameiosis
- 27. Multiple ChoiceDuring meiosis I, what happens?Sister chromatids are splitHomologous chromosomes are splitFour cells are createdNone of the other choices are correct
- 28. Multiple ChoiceWhen an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurscrossing overmutagenesishybridizationfertilization
- 29. Multiple ChoiceHuman eggs and sperm are _____, and each has ____ chromosomes.diploid, 23diploid, 46haploid, 23haploid, 46
- 30. Multiple ChoiceImagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.100 percent yellow-green seeds100 percent yellow seeds50 percent yellow, 50 percent green seeds25 percent green, 75 percent yellow seeds
- 31. Multiple ChoiceA recessive trait will be observed in individuals that are ________ for that trait.heterozygoushomozygous or heterozygoushomozygousdiploid
- 32. Multiple ChoiceIn humans, if a non-disjunction event leads to an individual that is XXY, they wouldbe female because they have 2 X chromosomesbe male because they have a Y chromosomenot survivehave both male and female characteristics
- 33. Multiple ChoiceChromosomes that do NOT play a role in determining the sex of an individual are calledsex chromosoemsX and YautosomesA and B are correct
- 34. Multiple Choice
If a particular pedigree follows a sex-linked recessive trait, you would expect to see
more affected females
all carrier males
more affected males
an equal number of affected males and females
- 35. Multiple ChoiceIn humans, hemophilia is an X-linked recessive trait. If a man and a woman have a son who is affected with hemophilia, which of the following is definitely true?The mother carries an allele for hemophiliaThe father carries an allele for hemophiliaThe father is afflicted with hemophiliaboth parents carry an allele for hemophilia
- 36. Multiple ChoiceA person with Turner syndrome has only one X chromosome. This means one of their gametes was missing a chromosome.
Which of the following is why gametes sometimes lack a complete chromosome?Incomplete dominanceNondisjunctionInversion mutationSubstitution mutation - 37. Multiple ChoiceGive the genotype for person III-3GGGgggCannot determine
- 38. Multiple ChoiceHemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?XHXhXhXhXHYXhY - 39. Multiple ChoiceThe range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles. This is an example of:incomplete dominancecodominancemultiple allelespolygenic inheritance
- 40. Multiple ChoiceGametes are _________.DiploidHaploidAneuploidvariably ploidy
- 41. Multiple ChoiceIn Drosophila, the genes for eye colour (pr), wing shape (vg), and body colour (eb) are all found on the same chromosome. The following crossover frequencies for these genes were determined by experimentation. Determine the sequence of genes on the chromosome.eb - vg - prvg - eb - prvg - pr - ebpr- vg - eb
- 42. Multiple ChoiceWhat type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")Sex-Linked DominantSex-Linked RecessiveAutosomal DominantAutosomal Recessive - 43. Multiple ChoiceX-linked conditions are more common in men than in women becauseThe genes associated with the X linked conditions are linked to the X chromosome, which determines maleness.Men need to inherit only one copy of the recessive allele for the condition to be fully expressedWomen simply do not develop the disease regardless of their genetic compositionThe sex chromosomes are more active in men than in women
- 44. Multiple Choice
What is the inheritance pattern of this trait?
sex-linked recessive
autosomal dominant
autosomal recessive
Y-linked dominant
- 45. Multiple Choice
Which of the following contributes to genetic variation in sexually reproducing species?
crossing over, internal fertilization, independent assortment
independent assortment, spindle formation, random fertilization
random fertilization, DNA synthesis, independent assortment
random fertilization, independent assortment, crossing over
internal fertilization, spindle formation, crossing over
- 46. Multiple ChoiceWhich genes would show the highest frequency of crossing over?A-BA-DD-CB-C
- Answer choicesTagsAnswer choicesTags