why do inversion heterozygotes supress the appearebce of recombinat progeny that result from crossover events?
Homework Answers
Inversions are a special type of mutation in which a piece of chromosomal DNA is flipped 180 degrees. ... If the breakpoints in an inversion happen to fall within a gene, then the function of that gene will likely be disrupted.
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why
do inversion heterozygotes supress the appearebce of recombinat
progeny that result from crossover events?
Place the statements about inversions into the correct column. True False Most inversions do not result...
Place the statements about inversions into the correct column. True False Most inversions do not result in an abnormal phenotype (other than reduced fertility) in heterozygotes. An inversion causes a mutant phenotype in heterozygotes only when DNA is deleted. An inversion cannot increase expression of genes near the inversion breakpoint If an inversion breakpoint lies within a gene, a loss- of-function mutation may occur. Genes at the borders of Inversion breakpoints may be expressed in different cells than usual. Reset
I'm having trouble understanding this problem. The most frequent F2 progeny seem to have had crossover...
I'm having trouble understanding this problem. The most frequent
F2 progeny seem to have had crossover to me because the parents are
Aa Bb x aa bb but the progeny are Aa bb and aa Bb. I thought
parental progeny would have the same genotype as the parents. Can
you please explain how the most frequent progeny don't have
crossover? Thank you
In a dihybrid test cross the genotype of the F1 individual is Aa Bb and the tester genotype...
Why did Thomas Morgan's fruit fly experiment crossing wild type F1 heterozygotes with homozygous mutants result...
Why did Thomas Morgan's fruit fly experiment crossing wild type F1 heterozygotes with homozygous mutants result in different results than Gregor Mendel's pea plants? Also, why didn't Morgan see a perfect 1:1 ratio of parental types as expected?
In a trihybrid test cross, from which 1000 offspring are counted, how many double crossover offspring are expected if there is no crossover interference?
Provide an explanationThree genes are linked: a---------------20----------------b----------10------------c In a trihybrid test cross, from which 1000 offspring are counted, how many double crossover offspring are expected if there is no crossover interference? How many would be expected if there was 20% (0.20) crossover interference? Question 8 A geneticist collects three-point test cross data to map three genes as follows: -----20----------------b--------10-------- cIn the test cross data, a total of 18 double crossover offspring were collected out of 1000 progeny. What is the number of DCO offspring that...
Which of the listed gamete genotypes will result from a crossover at position 1 in the...
Which of the listed gamete genotypes will result from a
crossover at position 1 in the diagram below?
i) C1 A1 B1
ii) C2 A2 B2
iii) C1 A2 B2
iv) C2 A1 B1
v) C1 A1 B2
vi) C1 A2 B1
vii) C2 A2 B1
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following...
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-C-*-D-g-f-e-H A-B-C-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C-*-D-E-g-f-H A-B-C-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-f-g-D--C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-H c) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-e-d-*-C-F-G-H A-B-C-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C---D-E-g-f-H A-B-C-*-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-F-G-D---C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-h
How do you do this The result below are from a fruit fly triple point test...
How do you do this The result below are from a fruit fly triple point test cross Phenotype number of progeny wild type 283 all mutant 278 Black, spineless 50 Red 52 Spineless 5 Red, Black 3 Black 43 Red, spineless 41 A. What is the order and distance in map units between the three genes? B. What are the genotypes of the parents that produced these offspring?
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following...
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-C-*-D-g-f-e-H A-B-C-*-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C-*-D-E-g-f-H A-B-C-*-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-f-g-D-*-C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-H
What are the different kinds of chromosomal duplication, and how do they differ from each other?...
What are the different kinds of chromosomal duplication, and how do they differ from each other? What human disorder results from deletion of a region on chromosome 5 producing newborns that cry like a cat? If Dr. Obama wishes to reveal regions of the chromosomes that are rich in A-T base pairs in a karyotype preparation, she should use ___ to stain G bands on the chromosomes. A typical human karyotype has a total of ___ chromosomes and includes ___...
13,15 & 16 13. Deletion, Translocation, Inversion, Duplication, OR Mosaicism? Involved in 46, 5p- May result...
13,15 & 16
13. Deletion, Translocation, Inversion, Duplication, OR Mosaicism? Involved in 46, 5p- May result in a position effect which affects gene expression May result in pseudodominance of allele normally recessive to a dominant allele Two genetically distinct populations of cells in a single individual Will result in abnormal gamete formation (more than one answer) Involved in familial Down syndrome Lethal if it occurs in the same region of two homologous chromosomes No loss or gain of genetic material...
Place the statements about inversions into the correct column. True False Most inversions do not result in an abnormal phenotype (other than reduced fertility) in heterozygotes. An inversion causes a mutant phenotype in heterozygotes only when DNA is deleted. An inversion cannot increase expression of genes near the inversion breakpoint If an inversion breakpoint lies within a gene, a loss- of-function mutation may occur. Genes at the borders of Inversion breakpoints may be expressed in different cells than usual. Reset
I'm having trouble understanding this problem. The most frequent
F2 progeny seem to have had crossover to me because the parents are
Aa Bb x aa bb but the progeny are Aa bb and aa Bb. I thought
parental progeny would have the same genotype as the parents. Can
you please explain how the most frequent progeny don't have
crossover? Thank you
In a dihybrid test cross the genotype of the F1 individual is Aa Bb and the tester genotype...
Provide an explanationThree genes are linked: a---------------20----------------b----------10------------c In a trihybrid test cross, from which 1000 offspring are counted, how many double crossover offspring are expected if there is no crossover interference? How many would be expected if there was 20% (0.20) crossover interference? Question 8 A geneticist collects three-point test cross data to map three genes as follows: -----20----------------b--------10-------- cIn the test cross data, a total of 18 double crossover offspring were collected out of 1000 progeny. What is the number of DCO offspring that...
Which of the listed gamete genotypes will result from a
crossover at position 1 in the diagram below?
i) C1 A1 B1
ii) C2 A2 B2
iii) C1 A2 B2
iv) C2 A1 B1
v) C1 A1 B2
vi) C1 A2 B1
vii) C2 A2 B1
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-C-*-D-g-f-e-H A-B-C-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C-*-D-E-g-f-H A-B-C-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-f-g-D--C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-H c) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-e-d-*-C-F-G-H A-B-C-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C---D-E-g-f-H A-B-C-*-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-F-G-D---C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-h
b) Which chromosomal arrangements could result from a crossover in an individual heterozygous for the following two inverted chromosomes? (* denotes the centromere; assume no double crossovers) A-B-C-*-D-E-F-G-H A-B-C-*-D-g-f-e-H A-B-C-*-D-E-F-G-H A-B-C-*-e-d-F-G-H A-B-C-*-D-e-B-A A-B-C-*-D-E-g-f-H A-B-C-*-D-F-G-e-H A-B-C-*-D-e-A-B A-B-C-*-D-E-f-g-D-*-C-B-A H-G-F-E-d-*-C-F-G-H H-G-F-e-H
What are the different kinds of chromosomal duplication, and how do they differ from each other? What human disorder results from deletion of a region on chromosome 5 producing newborns that cry like a cat? If Dr. Obama wishes to reveal regions of the chromosomes that are rich in A-T base pairs in a karyotype preparation, she should use ___ to stain G bands on the chromosomes. A typical human karyotype has a total of ___ chromosomes and includes ___...
13,15 & 16
13. Deletion, Translocation, Inversion, Duplication, OR Mosaicism? Involved in 46, 5p- May result in a position effect which affects gene expression May result in pseudodominance of allele normally recessive to a dominant allele Two genetically distinct populations of cells in a single individual Will result in abnormal gamete formation (more than one answer) Involved in familial Down syndrome Lethal if it occurs in the same region of two homologous chromosomes No loss or gain of genetic material...
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