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
Homework Answers
single Cross over event we get 2 possibilities= A-------b and a-------B
3 cross over = 6 offspring
100-3=97 normal meiosis
Each meiosis gives 4 cell = 97 X 4 = 388
In 3 cross over event still 6 cells are in normal.
r between A and B = 6/400 = 0.015cM
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In 100 meiosis, 3 crossover events occurred between genes A and
B on one homologous chromosome...
Advanced Genetics Problem: Yeast chromosome 3 has these genes in this order: HIS4 LYS1 URA3 ADE2....
Advanced Genetics
Problem:
Yeast chromosome 3 has these genes in this order: HIS4 LYS1 URA3
ADE2. You have created a diploid strain of this genotype:
You sporulate the diploid and analyze tetrads. Most tetrads show
2:2 segregation for all markers and recombination frequencies that
are consistent with the established genetic map. However, you
notice the one strange tetrad indicated below:
Your goal is to explain how the genotypes of this tetrad arose
during meiosis:
a. Do these spores indicate that...
3. A phenotypically abnormal individual has a phenotypically normal father with an inversion on one copy of chromosome 7 and a normal mother without any changes in chromosome structure. The order of...
3. A phenotypically abnormal individual has a phenotypically normal father with an inversion on one copy of chromosome 7 and a normal mother without any changes in chromosome structure. The order of genes along chromosome 7 in the father is as follows: normal chromosome 7) RTDM centromere P UXZC RTDUP centromere MXZC (inverted chromosome 7) The phenotypically abnormal offspring has a chromosome 7 with the following order of genes R TDM centromere P U D TR With a sketch (complete),...
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...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment results in recombinant chromosomes. You can reliably predict the relative genetic distance from genes’ physical distance on a chromosome. Linked genes are always syntenic. What is the relative genetic distance between two linked genes if the recombination frequency is 0.49? 0.49 cM 4.9 cM 49 cM 490 cM What statement best explains the distortion in Mendelian ratios observed by Bateson & Punnett in 1905?...
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?
QUESTION 3 Crossing over refers to the pairing of homologous chromosomes during melosis a mutation that...
QUESTION 3 Crossing over refers to the pairing of homologous chromosomes during melosis a mutation that makes all alleles in homologous chromosomes identical an exchange of segments between the two members of a homologous chromosome pair during meiosis the loss of one or more chromosomes during melosis QUESTION 4 Place the following events of Meiosis I and Meiosis ll in the correct order: Duplicated chromosomes are separated Duplication of chromosomes Crossing over occurs Homologous chromosomes pair up - Homologous chromosomes...
1. Crossing over is important because it _____. a. allows the exchange of genes between homologous...
1. Crossing over is important because it _____. a. allows the exchange of genes between homologous chromosomes b. prevents variation in gametes c. holds tetrads together d. ensures that homologous chromosomes pair up 2. The M phase of mitosis and M phase of meiosis both occur after interphase. However, the two processes differ in the arrangement and behavior of their chromosomes. How? a. Homologous chromosomes pair up in mitosis, but not in meiosis. b. The pairing up of homologous chromosomes...
Crossing over is one of the most important events in meiosis because __. A) homologous chromosomes...
Crossing over is one of the most important events in meiosis because __. A) homologous chromosomes are separated into different daughter cells B) the number of chromosomes allotted to each daughter cell must be halved C)sister chromatids must be separated into different daughter cells D) it produces new arrays of alleles on chromosomes and contributes to genetic diversity
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....
Advanced Genetics
Problem:
Yeast chromosome 3 has these genes in this order: HIS4 LYS1 URA3
ADE2. You have created a diploid strain of this genotype:
You sporulate the diploid and analyze tetrads. Most tetrads show
2:2 segregation for all markers and recombination frequencies that
are consistent with the established genetic map. However, you
notice the one strange tetrad indicated below:
Your goal is to explain how the genotypes of this tetrad arose
during meiosis:
a. Do these spores indicate that...
3. A phenotypically abnormal individual has a phenotypically normal father with an inversion on one copy of chromosome 7 and a normal mother without any changes in chromosome structure. The order of genes along chromosome 7 in the father is as follows: normal chromosome 7) RTDM centromere P UXZC RTDUP centromere MXZC (inverted chromosome 7) The phenotypically abnormal offspring has a chromosome 7 with the following order of genes R TDM centromere P U D TR With a sketch (complete),...
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...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
QUESTION 3 Crossing over refers to the pairing of homologous chromosomes during melosis a mutation that makes all alleles in homologous chromosomes identical an exchange of segments between the two members of a homologous chromosome pair during meiosis the loss of one or more chromosomes during melosis QUESTION 4 Place the following events of Meiosis I and Meiosis ll in the correct order: Duplicated chromosomes are separated Duplication of chromosomes Crossing over occurs Homologous chromosomes pair up - Homologous chromosomes...
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....
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