Human Genetics and Meiosis Quiz
Name____________________
Section___________________
1. In meiosis, the chromosome number is changed from the original parental number. At the end of Meiosis II, how many chromosomes are present in the daughter cells if that original number was 24?
2. In meiosis I, the daughter cells have the same number of chromosomes as the parental cell, although the daughter cells consists solely of (chromatids / homologs)?
3. Crossing over can take place only between chromosomes which are (chromatids / homologs)?
4, In what phase of meiosis does crossing over occur? (Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II or Telophase II).
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5. In males, can the sperm contain both mother and father chromosomes or only the father’s?
6. In monohybrid crosses involving complete dominance, the F2 generation will have what phenotype ratio?
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7. If you cross a homozygous recessive time a heterozygous individual, what will the resulting phenotype ratio be?
8. A male has blue eyes and he marries a woman with brown eyes whose mother was blue eyed. The blue-eyed gene is completely recessive to other eye colors. What is the chance of them having a blue-eyed child?
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9. Curly hair texture is incompletely dominant over straight hair. A cross of curly hair times straight hair will produce a wavy hair condition. A wavy haired man marries a wavy haired woman. What is chances of having a child with curly hair?
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10. Complete dominance in a monohybrid cross results in just two phenotypes. How many phenotypes will result with a monohybrid cross with incomplete dominance?
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Using the PTC pedigree, answer the following questions (11-12).
11. If Jill marries Howard, what is the probability that their children will be Tasters ___________
and Non tasters _________________.
12. Using “T” for Tasting and “t” for Non Tasting, What is the genotype for Ann? ____________
Genotype for Bill? ____________
12. If Pam marries Howard, what is the probability that their children would be
Tasters? __________________
Non tasters? _______________
13. If a trait is sex-linked, on what chromosome is the trait located?_______________________
From the above Pedigree of Sickle-cell Disease, answer the following questions.
14. If in their native country where malaria is prevalent, numbers 7, 9, 10, 13, 17, 29, 31 32 33 and 34 have malaria or have died from malaria, what is the disadvantage of their genotype?
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15. Is sickle-cell disease a completely dominant trait or incompletely dominate? ______________
16. In countries where malaria is not prevalent or non-existent, why is the sickle-cell disease a disadvantage?
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17. Give an example of a trait that demonstrates multiple alleles. __________________________
18. Give the blood type which is the universal donor__________ universal receiver ___________.
19. A paternity suit involve a woman with blood type A, has a baby of blood type O, is suing a
man with blood type AB. Could he be the biological father? __________________________
20. A baby is born with blood type O, whose father is blood type A and the mother is blood type B, is this the biological baby of these parents? Explain your answer.
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