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27. An individual has the following genotype. Gene loci (A) and (B) are 15 map units...
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...
Consider an individual with the genotype Ab/aB (below). The A and B genes are 27 map...
Consider an individual with the genotype Ab/aB (below). The A and B genes are 27 map units apart. Given this information, indicate the correct genotypes, and respective corresponding expected frequencies, for ALL possible gametes that can be produced by this individual during meiosis.
Use the following genetic map, where the numbers indicate map units between adjacent loci : a---15...
Use the following genetic map, where the numbers indicate map units between adjacent loci : a---15 cM---b---5 cM---c---20 cM---d---30 cM---e, to answer the question. What is the frequency of gametes with the genotype aBCDe from a completely heterozygous individual with the genotype ABCDE / abcde?
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated...
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated with a gblgb individual. a) Show the genotype of an FI offspring demonstrating linkage. b) What gametes can the Fl produce AND in what frequency? If the F1 generation mate amongst themselves, what is the frequency of GGbh F2 offspring? (show your work) c)
Inversion Problems: An individual is heterozygous for an inversion: ADCBEFG HI, and during gamete formation there...
Inversion Problems: An individual is heterozygous for an inversion: ADCBEFG HI, and during gamete formation there is a crossing over event between C and B. Draw chromosome structure pre and post meiosis. Be sure to label the chromatids/chromosomes with the appropriate sequence of genes. Label mutant and wild type chromatids/chromosomes, viable and non-viable gametes. Circle and identify the mutations in the non-viable gametes inuerston If an individual is heterozygous for an inversion, ABC DGFEHI, and a crossing over event occurred...
Which of the following statement(s) are true? Morgan traced the eye colour gene in flies to...
Which of the following statement(s) are true? Morgan traced the eye colour gene in flies to the X chromosome. 50% recombinant progeny are observed for two unlinked genes, which is due to the independent assortment of homologous chromosomes in metaphase 1 In very long chromosomes > 50% recombination can be observed. Crossing over between homologous, parental chromosomes is the mechanism of breaking up linkage of two genes to form recombinant chromosomes. The frequency of recombination is directly proportional to the...
Linkage: Consider three genes, each with two alleles. An individual with genotype AAbbDD is crossed with...
Linkage: Consider three genes, each with two alleles. An individual with genotype AAbbDD is crossed with an individual whose genotype is aaBBdd. What are all the gamete types (gamete genotypes) that their offspring (AaBbDd) can produce? Draw chromosome diagrams if it helps you to answer the question. a. If the three genes are unlinked? b. If all three links are tightly linked (no crossing over)? c. If the first two genes are tightly linked (no crossing over), but the third...
15. You are studying com plants. You were able to determine that the gene for kernel...
15. You are studying com plants. You were able to determine that the gene for kernel color (C-colored and no color) and kernel waxiness (W = waxy and not waxy) are on the same chromosome and are 30 CM apart. You are ultimately interested in determining the potential phenotypic ratio if crossing over occurs. You start by crossing a male who is homozygous dominant for both genes with a female who is homozygous recessive for both genes. The F1 heterozygotes...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
The following cross was carried out: BBdd x bbDD and all of the F1 offspring had...
The following cross was carried out: BBdd x bbDD and all of the F1 offspring had the genotype BbDd. A) What are the possible gametes that these F1 offspring could produce? Put a circle around each type of gamete to make clear the alleles present in that gamete. B) If one of these F1 offspring is subjected to a testcross, which offspring genotypes would be considered recombinant and which offspring genotypes would be considered non-recombinant (parental). Make sure to indicate...
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...
Consider an individual with the genotype Ab/aB (below). The A and B genes are 27 map units apart. Given this information, indicate the correct genotypes, and respective corresponding expected frequencies, for ALL possible gametes that can be produced by this individual during meiosis.
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated with a gblgb individual. a) Show the genotype of an FI offspring demonstrating linkage. b) What gametes can the Fl produce AND in what frequency? If the F1 generation mate amongst themselves, what is the frequency of GGbh F2 offspring? (show your work) c)
Inversion Problems: An individual is heterozygous for an inversion: ADCBEFG HI, and during gamete formation there is a crossing over event between C and B. Draw chromosome structure pre and post meiosis. Be sure to label the chromatids/chromosomes with the appropriate sequence of genes. Label mutant and wild type chromatids/chromosomes, viable and non-viable gametes. Circle and identify the mutations in the non-viable gametes inuerston If an individual is heterozygous for an inversion, ABC DGFEHI, and a crossing over event occurred...
Which of the following statement(s) are true? Morgan traced the eye colour gene in flies to the X chromosome. 50% recombinant progeny are observed for two unlinked genes, which is due to the independent assortment of homologous chromosomes in metaphase 1 In very long chromosomes > 50% recombination can be observed. Crossing over between homologous, parental chromosomes is the mechanism of breaking up linkage of two genes to form recombinant chromosomes. The frequency of recombination is directly proportional to the...
15. You are studying com plants. You were able to determine that the gene for kernel color (C-colored and no color) and kernel waxiness (W = waxy and not waxy) are on the same chromosome and are 30 CM apart. You are ultimately interested in determining the potential phenotypic ratio if crossing over occurs. You start by crossing a male who is homozygous dominant for both genes with a female who is homozygous recessive for both genes. The F1 heterozygotes...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
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