If a single crossover occurs between two genes in 30% of the cells that are undergoing...
If a single crossover occurs between two genes in 30% of the cells that are undergoing meiosis, what percentage of the total gametes will be genetic recombinants with respect to those two genes?
Homework Answers
15 % because one cell produces 4 gametes in which 2 will be parental and 2 will be recombinant. So if crossing over is occurring in 30% of the cells then 15% will be the recombinant gametes produced.
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If a single crossover occurs between two genes in 30% of the
cells that are undergoing...
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....
12. What is a map unit? Choose the best answer The physical distance between 2 genes...
12. What is a map unit? Choose the best answer The physical distance between 2 genes on a chromosome, measured in the number of nucleotides (base pairs) between the 2 genes. The distance between 2 genes on a sa le chromosome measured by the % of recombinant-type gametes produced by many individuals e nes) of the same genotype, this is the same as the % of ,ecombinant-type offspring produced in a cross or a double heterozypote with an individual hom...
(a) Somatic mutation typically occurs in sex cells. decreases with maternal age. shows that each of...
(a) Somatic mutation typically occurs in sex cells. decreases with maternal age. shows that each of us does not have a single, permanent genotype. takes place in the cells that give rise to gametes. (b) These three things describe how genes affect the environments to which people are exposed. (c) If a family history of mental retardation, psychological disorders, physical defects, or inherited diseases exists, a genetic counselor prepares a __________, which identifies affected relatives in a couple s family...
You sample a number of cells that have undergone meiosis looking for the production of recombinants...
You sample a number of cells that have undergone meiosis looking for the production of recombinants between the genes ec, vg, and s. You find 10 cells with no crossovers between ec and s. 30 with 1 crossover between ec ands, 10 with 2 crossovers between ec and s, and zero with three or more crossovers. What is the map distance between the genes ec and s? 1.2 CM 0.8 CM 0.6 CM 0.2 CM 1.0 CM In a data...
In 100 meiosis, 3 crossover events occurred between genes A and B on one homologous chromosome...
In 100 meiosis, 3 crossover events occurred between genes A and B on one homologous chromosome and a, b on the other, what is the r between genes A and B
1. A genetic cross in which the inheritance of two traits is observed is called a...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a hallmark of independent assortment. Genes that are located close together on the same chromosome have a recombination frequency less than 50%, which is an indication of linkage. Complete the following questions to investigate recombination frequency between genes that are far apart on the same chromosome. Two genes on the same chromosome may have no crossover (NCO), a single crossover (SCO), or a double crossover...
n a series of two-point map crosses involving four genes the following recombinant (single crossover) frequencies...
n a series of two-point map crosses involving four genes the following recombinant (single crossover) frequencies were observed. A-D 30 C-B 25 D-B 15 A-C 40 D-C 10 A-B 15 What is the order of the genes if “A” is near one end?
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...
what is the crossover percentage between two genes that are 10 map units apart 2. (25...
what is the crossover percentage between two genes that are 10
map units apart
2. (25 points) In a monohybrid, the phenotype of the F2 generation will follow a ratio of In a dihybrid, the phenotype of the F2 generation will follow a ratio of When performing a chi-square analysis, the cutoff p value is- The degree of freedom (df) for a monohybrid and the degree of freedom for dihybrid is The formula to calculate the chi-square is 3. 25...
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....
12. What is a map unit? Choose the best answer The physical distance between 2 genes on a chromosome, measured in the number of nucleotides (base pairs) between the 2 genes. The distance between 2 genes on a sa le chromosome measured by the % of recombinant-type gametes produced by many individuals e nes) of the same genotype, this is the same as the % of ,ecombinant-type offspring produced in a cross or a double heterozypote with an individual hom...
You sample a number of cells that have undergone meiosis looking for the production of recombinants between the genes ec, vg, and s. You find 10 cells with no crossovers between ec and s. 30 with 1 crossover between ec ands, 10 with 2 crossovers between ec and s, and zero with three or more crossovers. What is the map distance between the genes ec and s? 1.2 CM 0.8 CM 0.6 CM 0.2 CM 1.0 CM In a data...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
Required information The recombination frequency between genes that are located on different chromosomes is 50%, a hallmark of independent assortment. Genes that are located close together on the same chromosome have a recombination frequency less than 50%, which is an indication of linkage. Complete the following questions to investigate recombination frequency between genes that are far apart on the same chromosome. Two genes on the same chromosome may have no crossover (NCO), a single crossover (SCO), or a double crossover...
what is the crossover percentage between two genes that are 10
map units apart
2. (25 points) In a monohybrid, the phenotype of the F2 generation will follow a ratio of In a dihybrid, the phenotype of the F2 generation will follow a ratio of When performing a chi-square analysis, the cutoff p value is- The degree of freedom (df) for a monohybrid and the degree of freedom for dihybrid is The formula to calculate the chi-square is 3. 25...
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