Crossing over and recombination occur during

Crossing over and recombination occur during
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 Ans. Meiosis division
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Crossing over that results in genetic recombination in higher organisms occurs between

Description : Crossing over that results in genetic recombination in higher organisms occurs between

Last Answer : Crossing over that results in genetic recombination in higher organisms occurs between A. Non- ... bivalents D. Sister chromatids of a bivalents

Crossing over in diploid organism is responsible for (a) segregation of alleles (b) recombination of linked alleles (c) dominance of genes (d) linkage between genes.

Description : Crossing over in diploid organism is responsible for (a) segregation of alleles (b) recombination of linked alleles (c) dominance of genes (d) linkage between genes.

Last Answer : b) recombination of linked alleles

Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to (a) repulsion (b) recombination (c) linkage (d) crossing over.

Description : Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to (a) repulsion (b) recombination (c) linkage (d) crossing over.

Last Answer : (c) linkage

In which stage, crossing over takes place?

Description : In which stage, crossing over takes place?

Last Answer : Ans. Pachytene stage

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to occur? (a) Chromosomes will be fragmented. (b) Chromosomes will not segregate. (c) Recombination of chromosome arms will occur. (d) Chromosomes will not condense

Description : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to ... will not segregate. (c) Recombination of chromosome arms will occur. (d) Chromosomes will not condense

Last Answer : (b) Chromosomes will not segregate.

Which one of the following is common between prokaryotic and eukaryotic chromosomes? a. Presence or absence of introns. b. Loop or linear chromosomes. c. Genetic recombination occurrence in RNA. d. Mutations occur in the DNA.

Description : Which one of the following is common between prokaryotic and eukaryotic chromosomes? a. Presence or absence of introns. b. Loop or linear chromosomes. c. Genetic recombination occurrence in RNA. d. Mutations occur in the DNA.

Last Answer : d. Mutations occur in the DNA.

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ? (1) Chromosomes will be fragmented (2) Chromosomes will not segregate (3) Recombination of chromosome arms will occur (4) Chromosomes will not condense

Description : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur ... will not segregate (3) Recombination of chromosome arms will occur (4) Chromosomes will not condense

Last Answer : (2) Chromosomes will not segregate

Crossing of plants through fusion of somatic cell

Description : Crossing of plants through fusion of somatic cell

Last Answer : Ans. Somatic hybridization

A variety produced by crossing in all combinations a number of lines that combine well each other

Description : A variety produced by crossing in all combinations a number of lines that combine well each other

Last Answer : Ans. Synthetic variety

Repeated crossing of hybrid progeny back to one of its parents

Description : Repeated crossing of hybrid progeny back to one of its parents

Last Answer : Ans. Back Cross

why crossing over cannot occur of linked genes -Biology

Description : why crossing over cannot occur of linked genes -Biology

Last Answer : answer:

why crossing over cannot occur of linked genes -Biology

Description : why crossing over cannot occur of linked genes -Biology

Last Answer : answer:

In which stage of cell does crossing over occur? What is its role in the origin of species?

Description : In which stage of cell does crossing over occur? What is its role in the origin of species? 

Last Answer : Ans: Pachytene of Meiosis. It brings about variations in the off spring. Continuation of these variations for several generations leads to origin of new species. 

What Recombination occurs during .?

Description : What Recombination occurs during .?

Last Answer : meiosis

What phase of meiosis does crossing occur?

Description : What phase of meiosis does crossing occur?

Last Answer : prophase 1.

Which does NOT occur in a cell stimulated by a steroid hormone? A) The steroid hormone enters the cell by crossing the plasma membrane. B) The hormone binds to a receptor molecule in the cytoplasm. C) The second messenger cyclic AMP is stimulated by the hormone-receptor complex. D) The hormone-receptor complex binds the chromatin and activates certain genes. E) DNA is transcribed, mRNA is translated, and the result is protein synthesis.

Description : Which does NOT occur in a cell stimulated by a steroid hormone? A) The steroid hormone enters the cell by crossing the plasma membrane. B) The hormone binds to a receptor molecule in the ... activates certain genes. E) DNA is transcribed, mRNA is translated, and the result is protein synthesis.

Last Answer : C) The second messenger cyclic AMP is stimulated by the hormone-receptor complex. D) The hormone-receptor complex binds the chromatin and activates certain genes.

When male and female flowers occur on different plants

Description : When male and female flowers occur on different plants

Last Answer : Ans. Diocious

When male and female flowers occur on the same plant

Description : When male and female flowers occur on the same plant

Last Answer : Ans. Monocius

In which cells does the meiosis occur?

Description : In which cells does the meiosis occur?

Last Answer : Ans. Reproductive cells

In which cells does mitosis occur?

Description : In which cells does mitosis occur?

Last Answer : Ans. Somatic cells

Upper leaves will show chlorosis on midrib, veins green and dead spots occur in all parts of leaf (veins, tips and margins) show

Description : Upper leaves will show chlorosis on midrib, veins green and dead spots occur in all parts of leaf (veins, tips and margins) show

Last Answer : Ans. Zn deficiency

All weather phenomena (i.e. Rain, fog, frost, clouds) occur in the zone of

Description : All weather phenomena (i.e. Rain, fog, frost, clouds) occur in the zone of

Last Answer : Ans. Troposphere

What is recombination? -Biology

Description : What is recombination? -Biology

Last Answer : answer:

What pair of chromosome doesn't go through crossover or recombination?

Description : What pair of chromosome doesn't go through crossover or recombination?

Last Answer : Need answer

Mechanism preventing interbreeding is called – (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Description : Mechanism preventing interbreeding is called – (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Last Answer : (2) Isolation Explanation: Because interbreeding can destroy the genetic integrity of a species, causing it to become progressively infertile or extinct, evolutionary changes in anatomy ... reproduction from occurring. Reproductive Isolation is very important in keeping animal species separated.

.Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Description : .Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Last Answer : b) mutation

Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Description : Change in sequence of nucleotide in DNA is called (a) mutagen (b) mutation (c) recombination (d) translation.

Last Answer : mutation

A change in genetic constitution, which arises suddenly and not to segregation and recombination of genes in sexual reproduction is called as: a. Hybridization b. Bud variation c. Mutation d. Non of them

Description : A change in genetic constitution, which arises suddenly and not to segregation and recombination of genes in sexual reproduction is called as: a. Hybridization b. Bud variation c. Mutation d. Non of them

Last Answer : Mutation

Two linked genes a and b show 20% recombination. the individuals of a dihybrid cross between ++/++ × ab/ab shall show gametes (a) ++ : 80 : : ab : 20 (b) ++ : 50 : : ab : 50 (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10 (d) ++ : 30 : : ab : 30 : : + a : 20 : : + b : 20.

Description : Two linked genes a and b show 20% recombination. the individuals of a dihybrid cross between ++/++ × ab/ab shall show gametes (a) ++ : 80 : : ab : 20 (b) ++ : 50 : : ab : 50 (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10 (d) ++ : 30 : : ab : 30 : : + a : 20 : : + b : 20.

Last Answer : (c) ++ : 40 : : ab : 40 : : + a : 10 : : + b : 10

Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Description : Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they ... every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Last Answer : (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis.

The frequency of recombination between gene present on the same chromosome as a measure of the distance between genes was explained by (a) Sutton Boveri (b) T.H. Morgan (c) Gregor J.Mendel (d) Alfred Sturtevant.

Description : The frequency of recombination between gene present on the same chromosome as a measure of the distance between genes was explained by (a) Sutton Boveri (b) T.H. Morgan (c) Gregor J.Mendel (d) Alfred Sturtevant.

Last Answer : (d) Alfred Sturtevant.

Antibody diversity results from a. Apoptosis. b. Antigenic shift. c. Somatic recombination. d. Complement binding.

Description : Antibody diversity results from a. Apoptosis. b. Antigenic shift. c. Somatic recombination. d. Complement binding.

Last Answer : c. Somatic recombination.

Which of the following cause new emerging infectious diseases? a. mutation b. recombination c. cross host ranges d. A-C are correct

Description : Which of the following cause new emerging infectious diseases? a. mutation b. recombination c. cross host ranges d. A-C are correct

Last Answer : d. A-C are correct

Newly emerging viruses causing human disease can arise from a. Species Jumping. b. Mutations. c. Genetic Recombination. d. All Of The Above (A—C) Are Correct.

Description : Newly emerging viruses causing human disease can arise from a. Species Jumping. b. Mutations. c. Genetic Recombination. d. All Of The Above (A—C) Are Correct.

Last Answer : d. All Of The Above (A—C) Are Correct.

Which one of the following is NOT an example of genetic recombination? a. Conjugation b. Binary fission c. Transduction d. Transformation

Description : Which one of the following is NOT an example of genetic recombination? a. Conjugation b. Binary fission c. Transduction d. Transformation

Last Answer : c. Transduction

Which of the following type of recombination does not require homologous sequences and isutilized by mobile genetic elements that move about chromosomes? A.Mutagenicrecombimation B.Site-specific recombination C.Replicative recombination D.General recombination

Description : Which of the following type of recombination does not require homologous sequences and isutilized by mobile genetic elements that move about chromosomes? A.Mutagenicrecombimation B.Site-specific recombination  C.Replicative recombination  D.General recombination

Last Answer : C.Replicative recombination

Recombination of virus genomes occurs A- by transduction B- by transcription C- simultaneous infection of a host cell by two viruses with homologous chromosomes D- by transformation

Description : Recombination of virus genomes occurs A- by transduction B- by transcription C- simultaneous infection of a host cell by two viruses with homologous chromosomes D- by transformation

Last Answer : simultaneous infection of a host cell by two viruses with homologous chromosomes

The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination

Description : The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination

Last Answer : general recombination

Which of the following type of recombination does not require homologous sequences and isimportant for the integration of viral genomes into bacterial chromosomes? A- Mutagenic recombimation B- Site-specific recombination C- Replicative recombination D- General recombination

Description : Which of the following type of recombination does not require homologous sequences and isimportant for the integration of viral genomes into bacterial chromosomes? A- Mutagenic recombimation B- Site-specific recombination C- Replicative recombination D- General recombination

Last Answer : Site-specific recombination

The transposase gene encodes an enzyme that facilitate A- viral replication within a genome B- general recombination C- site-specific integration of transposable elements D- none of the above

Description : The transposase gene encodes an enzyme that facilitate A- viral replication within a genome B- general recombination C- site-specific integration of transposable elements D- none of the above

Last Answer : site-specific integration of transposable elements

Proteomes provide a link between organism’s ________ a. Mutations and recombination b. Gene products and its regulators c. Genetics and physiology d. Tandem repeats and introns

Description : Proteomes provide a link between organism’s ________ a. Mutations and recombination b. Gene products and its regulators c. Genetics and physiology d. Tandem repeats and introns

Last Answer : c. Genetics and physiology

Mechanism preventing interbreeding is called : (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Description : Mechanism preventing interbreeding is called : (1) Adaptation (2) Isolation (3) Reproduction (4) Recombination

Last Answer : Isolation

A woman who lived in Germany during World War II wanted to cross the German/Swiss border in order to escape Nazi pursuers. The bridge which she is to cross is a half mile across, over a large canyon. Every three minutes a guard comes out of his bunker and checks if anyone is on the bridge. If a person is caught trying to escape German side to the Swiss side they are shot. If caught crossing the other direction without papers they are sent back. She knows that it takes at least five minutes to cross the bridge, in which time the guard will see her crossing and shoot her. How does she get across? -Riddles

Description : A woman who lived in Germany during World War II wanted to cross the German/Swiss border in order to escape Nazi pursuers. The bridge which she is to cross is a half mile across, over a large canyon. ... , in which time the guard will see her crossing and shoot her. How does she get across? -Riddles

Last Answer : She waits until the guard is inside his hut, then walks halfway across before starting to walk back. The guard, seing she has no papers, sends her 'back'.

Assertion : Crossing over take place during pachytene stage. Reason : It is a process of interchange of chromatid material between non sister chromati

Description : Assertion : Crossing over take place during pachytene stage. Reason : It is a process of interchange of chromatid material between non sister chromati

Last Answer : Assertion : Crossing over take place during pachytene stage. Reason : It is a process of interchange of ... D. If both Assertion & Reason are false.

What would be the results if crossing over did not happen during meiosis in humans?

Description : What would be the results if crossing over did not happen during meiosis in humans?

Last Answer : There would be less genetic variation in humans

What happens during crossing over biology?

Description : What happens during crossing over biology?

Last Answer : Need answer

Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Path ene (4) Diplotene

Description : Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Path ene (4) Diplotene

Last Answer : (3) Path ene Explanation: Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes. It is one of the ... recombination, which occurs during prophase I of meiosis (pachytene) during a process called synapsis.

Segregation of Mendelian factors (no linkage, no crossing over) occurs during (a) anaphase I (b) anaphase II (c) diplotene (d) metaphase I.

Description : Segregation of Mendelian factors (no linkage, no crossing over) occurs during (a) anaphase I (b) anaphase II (c) diplotene (d) metaphase I.

Last Answer : a) anaphase I

Which of the following options gives the correct sequence of events during mitosis ? (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation → Telophase (b) Condensation → Crossing over → Nuclear membrane disassembly → Segregation → Telophase (c) Condensation → Arrangement at equator → Centromere division → Segregation → Telophase (d) Condensation → Nuclear membrane disassembly → Crossing over → Segregation → Telophase

Description : Which of the following options gives the correct sequence of events during mitosis ? (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation ... (d) Condensation → Nuclear membrane disassembly → Crossing over → Segregation → Telophase

Last Answer : (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation → Telophase

Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Pachytene (4) Diplotene

Description : Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Pachytene (4) Diplotene

Last Answer : Pachytene