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11 Cards in this Set
- Front
- Back
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Are there any differences b/w the genetic materials of the two daughter cells of a mother cell after mitosis? If they are, what are they?
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There in no difference because crossing over doesn't occur during mitosis and only during meiosis
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Can a haploid cell undergo meiosis? If not, explain why? |
No, meiosis requires the pairing of homologous chromosomes, which does not occur with haploid cells. |
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Assume one family has a rare recessive disease and the other family has a rare dominant disease. If you compare the pedigree of these two families, what are the major differences b/w these two pedigrees
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The parents for the one with the recessive disease will both have heterozygous recessive A/a while the parents with the dominant disease, one will have homozygous recessive. The F1 offspring for both families have a chance to carry the disease.
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From the intro story of ch 1, Sally and her parents are normal but her sister is albino. It seems that Sally has a chance to carry the albino allele. What is the chance? If she marries a normal looking boy Tom, in whose family the only albino person is Tom's brother, what is the chance for Sally and Tom to have an albino baby? |
2/3 X 2/3 x 1/4 |
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For human males, X chromosome and Y chromosome are different. What guarantees the success of meiosis? |
Success of meiosis requires that all chromosomes find their homologous partner and achieve recombination and pairing |
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Can males have X chromosome inactivation? |
Yes they can, but only if they have multiple x's
XXY is an example, the Kinefelter syndrome |
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I have several white albino turtles. How can i test whether their mutations are in the same gene or not? |
By complementation or making two mutants and see whether the phenotype of the offspring are all mutant or wild type |
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For genes on different chromosomes, which process of meiosis generates recombinants? |
prophase I |
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The maize genes sh and bz are linked, 30 map units apart. If a plant sh+ bz/sh bz+ is selfed, what proportion of the progeny will be sh bz/sh bz? |
look at sheet ch 5 Q12 |
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What are the two categories of alterations in chromosomes? |
Mutation in chromosomal structure - duplication, deletion, inversion, translocation
Mutation in chromosomal numbers -aneuploidy, polyploidy |
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why is a triploid organism sterile? |
You would have a lower chance to get haploid cells b/c it only allows one copy of each gene. Haploid cannot undergo meiosis. Triploid cannot produce offspring b/c it does not produce normal haploid. |
