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Inversion Problems: An individual is heterozygous for an inversion: ADCBEFG HI, and during gamete formation there...
19. A viable inversion heterozygote is undergoing meiosis. The chromosomes are illustrated below. Compare the consequences...
19. A viable inversion heterozygote is undergoing meiosis. The chromosomes are illustrated below. Compare the consequences of crossing over in two cases: crossing over between C and D, and crossing over between F and G ABCDEFGHIJK 2 ABCHG FEDIJK 20. Using the same inverted chromosome above: a. Two crossing over events occur among these chromatids: a crossover between genes H and G on chromatids 2 and 4, and a crossover between genes D and E on chromatids 1 and 3....
Practice Problems 7: Chromosome Variation in Structure 1. A petunia is heterozygous for the following inversion...
Practice Problems 7: Chromosome Variation in Structure 1. A petunia is heterozygous for the following inversion of chromosome 1 (the dot is the centromere): A a b B C D • E C F f G g e d a. Is this a paracentric or pericentric inversion? b. Draw the pairing configuration at prophase l including all 4 chromatids. c. Give the genotypes of the gametes from this meiosis if there is a single cross-over between genes D and E,...
1. A flower is heterozygous for the following inversion of chromosome 1 (dot=centromere) A B C ...
1. A flower is heterozygous for the following inversion of chromosome 1 (dot=centromere) A B C ● D E F G a b e d ● c f g a. Is this a paracentric or pericentric inversion? I am thinking Pericentric? b. Draw the pairing configuration at prophase I including all 4 chromatids. I wasnt too sure how to map the loop out for this one c. Give the genotypes of the gametes from this meiosis if there is a...
1. DNA testing of an individual with Klinefelter syndrome shows that they are heterozygous at mul...
1. DNA testing of an individual with Klinefelter syndrome shows that they are heterozygous at multiple loci on the X chromosome. At these loci they have one allele that matches their dad's X chromosome and one allele that matches one of their mom's X chromosomes. Did nondisjunction take place during: A) meiosis l in the oocyte B) meiosis l in the sperm C) meiosis l in the oocyte D) meiosis Il in the sperm Diagram meiosis in the affected gamete...
Mr Crabs suffers from semi-sterility due to a pericentric inversion on chromosome #10. His normal chromosome...
Mr Crabs suffers from semi-sterility due to a pericentric inversion on chromosome #10. His normal chromosome #10 has the sequence of genes as follows (the dot represents the centromere): ABCD·EFGH. His inverted #10 has the sequence: AFE·DCBGH. a. What proportion of Mr Crab’s gametes will be viable if no crossing over occurs within the inverted segment? b. What proportion of Mr Crab’s gametes will be viable if a cross over occurs between genes F-E? c. What is the sequence of...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the genes are on chromosome 1, and one of the genes is on chromosome 2. Allow crossing over to occur between the two genes on the same chromosome. Also, are there multiple ways that the chromosomes could segregate to produce different results? Show them. Instructions: Set up your cell. The cell you start with should be: A diploid cell It should contain 2 pairs of...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as well as differences. Which of the following represent similarities? a) Both increases genetic variation b) Both change in chromosomes number in daughter cells c) Both only occur in eukaryotes D) DNA replication must occur prior to both e) Both make use of a spindle to separate chromatids 2) Meiosis is a special form of cell division. Select any of the following that applies to...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. 28. Now imagine the genes are completed linked in #27. 1) What are all possible gametes?
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20...
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. bb BB 28. Now imagine the genes are completed linked in #27. 1) What...
Here are data from crossing a phenotypically wild-type female Drosophila (tly) F1 The Y and A...
Here are data from crossing a phenotypically wild-type female Drosophila (tly) F1 The Y and A genes are dosely linked on the same chromosome. In this cross, which of the following is true about the gametes produced by the F1 progeny 2 pt YYAA X Yaa YyAa A. YA & Ya gametes will outnumber YA & ya gametes. B. YA & ya gametes will outnumber yA & Ya gametes. C.YA. Ya, YA, & xa gametes will be present in equal...
19. A viable inversion heterozygote is undergoing meiosis. The chromosomes are illustrated below. Compare the consequences of crossing over in two cases: crossing over between C and D, and crossing over between F and G ABCDEFGHIJK 2 ABCHG FEDIJK 20. Using the same inverted chromosome above: a. Two crossing over events occur among these chromatids: a crossover between genes H and G on chromatids 2 and 4, and a crossover between genes D and E on chromatids 1 and 3....
Practice Problems 7: Chromosome Variation in Structure 1. A petunia is heterozygous for the following inversion of chromosome 1 (the dot is the centromere): A a b B C D • E C F f G g e d a. Is this a paracentric or pericentric inversion? b. Draw the pairing configuration at prophase l including all 4 chromatids. c. Give the genotypes of the gametes from this meiosis if there is a single cross-over between genes D and E,...
1. DNA testing of an individual with Klinefelter syndrome shows that they are heterozygous at multiple loci on the X chromosome. At these loci they have one allele that matches their dad's X chromosome and one allele that matches one of their mom's X chromosomes. Did nondisjunction take place during: A) meiosis l in the oocyte B) meiosis l in the sperm C) meiosis l in the oocyte D) meiosis Il in the sperm Diagram meiosis in the affected gamete...
27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. 28. Now imagine the genes are completed linked in #27. 1) What are all possible gametes?
Short Answer 27. An individual has the following genotype. Gene loci (A) and (B) are 20 map units apart, which determines their probability of recombination. 1) Indicate all the possible gametes that this individual can produce (with crossing over), 2) Label the gametes that are recombinant and non- recombinant. 3) Calculate the recombination frequency of the recombinant and non-recombinant gametes. The genes are not COMPLETELY linked. bb BB 28. Now imagine the genes are completed linked in #27. 1) What...
Here are data from crossing a phenotypically wild-type female Drosophila (tly) F1 The Y and A genes are dosely linked on the same chromosome. In this cross, which of the following is true about the gametes produced by the F1 progeny 2 pt YYAA X Yaa YyAa A. YA & Ya gametes will outnumber YA & ya gametes. B. YA & ya gametes will outnumber yA & Ya gametes. C.YA. Ya, YA, & xa gametes will be present in equal...
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