Complete the sentence. The alternative forms of gene at the same locus on homologous chromosomes are called what?

Complete the sentence. The alternative forms of gene at the same locus on homologous chromosomes are called what?  
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Answer :

ANSWER: ALLELES 
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Gametes have a. homologous chromosomes. b. twice the number of chromosomes found in body cells. c. two sets of chromosomes. d. one allele for each gene.

Description : Gametes have a. homologous chromosomes. b. twice the number of chromosomes found in body cells. c. two sets of chromosomes. d. one allele for each gene.

Last Answer : d. one allele for each gene.

Multiple alleles are present (a) at the same locus of the chromosome (b) on non-sister chromatids (c) on different chromosomes (d) at different loci on the same chromosome

Description : Multiple alleles are present (a) at the same locus of the chromosome (b) on non-sister chromatids (c) on different chromosomes (d) at different loci on the same chromosome

Last Answer : (a) at the same locus of the chromosome

Independent assortment of genes does not take place when (a) genes are located on homologous chromosomes (b) genes are linked and located on same chromosome (c) genes are located on non-homogenous chromosome (d) all of these.

Description : Independent assortment of genes does not take place when (a) genes are located on homologous chromosomes (b) genes are linked and located on same chromosome (c) genes are located on non-homogenous chromosome (d) all of these.

Last Answer : genes are linked and located on same chromosome

The region of the Lac operon which must be free from structural gene transcription to occur is (A) The operator locus (B) The promoter site (C) The ‘a’ gene (D) The ‘i’ gene

Description : The region of the Lac operon which must be free from structural gene transcription to occur is (A) The operator locus (B) The promoter site (C) The ‘a’ gene (D) The ‘i’ gene

Last Answer : Answer : A

The coding sequences in lac operon include (A) i gene (B) i gene, operator locus and promoter (C) z, y and a genes (D) i, z, y and a genes

Description : The coding sequences in lac operon include (A) i gene (B) i gene, operator locus and promoter (C) z, y and a genes (D) i, z, y and a genes

Last Answer : Answer : D

Lactose or its analogues act as positive regulators of lac operon by (A) Attaching to i gene and preventing its expression (B) Increasing the synthesis of catabolite gene activator protein (C) Attaching to promoter region and facilitating the binding of RNA polymerase holoenzyme (D) Binding to repressor subunits so that the repressor cannot attach to the operator locus

Description : Lactose or its analogues act as positive regulators of lac operon by (A) Attaching to i gene and preventing its expression (B) Increasing the synthesis of catabolite gene activator protein (C) ... holoenzyme (D) Binding to repressor subunits so that the repressor cannot attach to the operator locus

Last Answer : Answer : D

Transcription of structural genes of lac operon is prevented by binding of the repressor tetramer to (A) i gene (B) Operator locus (C) Promoter (D) z gene

Description : Transcription of structural genes of lac operon is prevented by binding of the repressor tetramer to (A) i gene (B) Operator locus (C) Promoter (D) z gene

Last Answer : Answer : B

RNA polymerase holoenzyme binds to lac operon at the following site: (A) i gene (B) z gene (C) Operator locus (D) Promoter region

Description : RNA polymerase holoenzyme binds to lac operon at the following site: (A) i gene (B) z gene (C) Operator locus (D) Promoter region

Last Answer : Answer : D

To commence structural gene transcription the region which should be free on lac operation is (A) Promoter site (B) Operator locus (C) Y gene (D) A gene

Description : To commence structural gene transcription the region which should be free on lac operation is (A) Promoter site (B) Operator locus (C) Y gene (D) A gene

Last Answer : Answer : B

The complex formed by a pair of synapsed homologous chromosomes is called

Description : The complex formed by a pair of synapsed homologous chromosomes is called

Last Answer : The complex formed by a pair of synapsed homologous chromosomes is called A. Axoneme B. Equatorial plate C. Kinetochore D. Bivalent

Pairing of homologous chromosomes is called :-

Description : Pairing of homologous chromosomes is called :-

Last Answer : Pairing of homologous chromosomes is called :- A. Disjunction B. Synapsis C. Segregation D. Polyteny

Separation of homologous chromosomes during Anaphase -I is called:-

Description : Separation of homologous chromosomes during Anaphase -I is called:-

Last Answer : Separation of homologous chromosomes during Anaphase -I is called:- A. Synapsis B. Disjunction C. Nondisjunction D. Crossing over

The complex formed by a pair of synapsed homologous chromosomes is called (a) bivalent (b) axoneme (c) equatorial plate (d) kinetochore.

Description : The complex formed by a pair of synapsed homologous chromosomes is called (a) bivalent (b) axoneme (c) equatorial plate (d) kinetochore.

Last Answer : (a) bivalent

What are homologous chromosomes? -Biology

Description : What are homologous chromosomes? -Biology

Last Answer : answer:

When do homologous chromosomes separate? -Biology

Description : When do homologous chromosomes separate? -Biology

Last Answer : answer:

When homologous chromosomes crossover what occurs? -Biology

Description : When homologous chromosomes crossover what occurs? -Biology

Last Answer : answer:

Why are homologous chromosomes not identical? -Biology

Description : Why are homologous chromosomes not identical? -Biology

Last Answer : answer:

Homologous chromosomes versus sister chromatids. -Biology

Description : Homologous chromosomes versus sister chromatids. -Biology

Last Answer : answer:

Why do homologous chromosomes pair up? -Biology

Description : Why do homologous chromosomes pair up? -Biology

Last Answer : answer:

Are homologous chromosomes genetically identical? -Biology

Description : Are homologous chromosomes genetically identical? -Biology

Last Answer : answer:

Homologous chromosomes segregate during -Biology

Description : Homologous chromosomes segregate during -Biology

Last Answer : answer:

Homologous chromosomes are pulled apart in -Biology

Description : Homologous chromosomes are pulled apart in -Biology

Last Answer : answer:

Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain associated at their centrometres. Or In whic

Description : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain associated at their centrometres. Or In whic

Last Answer : Identify the meiotic sage in which the homologous chromosomes separate while the sister chromatids remain ... II C. Metaphase I D. Metaphase II

What happens to each pair of duplicated homologous chromosomes during meiosis 1?

Description : What happens to each pair of duplicated homologous chromosomes during meiosis 1?

Last Answer : Need answer

What stage are there homologous chromosomes lined up down the middle of the cell?

Description : What stage are there homologous chromosomes lined up down the middle of the cell?

Last Answer : Metaphase 1

What random distribution of homologous chromosomes during meiosis?

Description : What random distribution of homologous chromosomes during meiosis?

Last Answer : What is the answer ?

What paired set of homologous chromosomes each composed of two sister chromatids?

Description : What paired set of homologous chromosomes each composed of two sister chromatids?

Last Answer : What is the answer ?

In which stage of meiosis do homologous chromosomes separate?

Description : In which stage of meiosis do homologous chromosomes separate?

Last Answer : Need answer

What and the difference between homologous chromosomes and sister chromatids?

Description : What and the difference between homologous chromosomes and sister chromatids?

Last Answer : Homologous chromosomes is a pair made of a paternal and maternalchromosomes. But sister chromatid is either pairs of paternal ormaternal chromosomes

Which of these statements about homologous autosomal chromosomes is true?

Description : Which of these statements about homologous autosomal chromosomes is true?

Last Answer : each of a homologous pair is the same size and shape as itspartner

Exchange of chromatin between non-sister chromatids of homologous chromosomes is known as

Description : Exchange of chromatin between non-sister chromatids of homologous chromosomes is known as

Last Answer : Ans. Crossing over

How many pairs of homologous chromosomes do humans have?

Description : How many pairs of homologous chromosomes do humans have?

Last Answer : Ans. 23 (II) Plant Breeding

What are homologous chromosomes ?

Description : What are homologous chromosomes ?

Last Answer : Which are the human cells that do not have homologous chromosomes? Chromosomes contain genes (genetic information in the form of nucleotide sequences) that command the protein synthesis thus ... chromosomes are the gametes since during meiosis the homologous chromosomes are separated.

Meiosis I is reductional division. Meiosis II is equational division due to (a) pairing of homologous chromosomes (b) crossing over (c) separation of chromatids (d) disjunction of homologous chromosomes.

Description : Meiosis I is reductional division. Meiosis II is equational division due to (a) pairing of homologous chromosomes (b) crossing over (c) separation of chromatids (d) disjunction of homologous chromosomes.

Last Answer : (c) separation of chromatids

Meiosis II performs (a) separation of sex chromosomes (b) synthesis of DNA and centromere (c) separation of homologous chromosomes (d) separation of chromatids.

Description : Meiosis II performs (a) separation of sex chromosomes (b) synthesis of DNA and centromere (c) separation of homologous chromosomes (d) separation of chromatids.

Last Answer : d) separation of chromatids.

Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.

Description : Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.

Last Answer : (c) two homologous chromosomes

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres. (a) Metaphase I (b) Metaphase II (c) Anaphase I (d) Anaphase I

Description : Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres. (a) Metaphase I (b) Metaphase II (c) Anaphase I (d) Anaphase I

Last Answer : (c) Anaphase I

Select the correct option. Column I Column II A. Synapsis aligns (i) Anaphase II homologous chromosomes B. Synthesis of (ii) Zygotene RNA and protein C. Action of enzyme (iii)G2-phase recombinase D. Centromeres do (iv) Anaphase I not separate but chromatids move towards opposite poles (v) Pachytene (a) A-(i), B-(ii), C-(v), D-(iv) (b) A-(ii), B-(iii), C-(iv), D-(v) (c) A-(ii), B-(i), C-(iii), D-(iv) (d) A-(ii), B-(iii), C-(v), D-(iv)

Description : Select the correct option. Column I Column II A. Synapsis aligns (i) Anaphase II homologous chromosomes B. Synthesis of (ii) Zygotene RNA and protein C. Action of enzyme (iii)G2-phase recombinase D. Centromeres do (iv) Anaphase I not ... ), C-(iii), D-(iv) (d) A-(ii), B-(iii), C-(v), D-(iv)

Last Answer : (d) A-(ii), B-(iii), C-(v), D-(iv)

Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below. Column I Column II A. Pachytene (i) Pairing of homologous chromosomes B. Metaphase I (ii) Terminalisation of chiasmata C. Diakinesis (iii) Crossing-over takes place D. Zygotene (iv) Chromosomes align at equatorial plate (a) A-(iii), B-(iv), C-(ii), D-(i) (b) A-(i), B-(iv), C-(ii), D-(iii) (c) A-(ii), B-(iv), C-(iii), D-(i) (d) A-(iv), B-(iii), C-(ii), D-(i)

Description : Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below. Column I Column II A. Pachytene (i) Pairing of homologous chromosomes B. Metaphase I (ii) ... , C-(iii), D-(i) (d) A-(iv), B-(iii), C-(ii), D-(i)

Last Answer : (a) A-(iii), B-(iv), C-(ii), D-(i)

The stage during which separation of the paired homologous chromosomes begins is (a) pachytene (b) diplotene (c) diakinesis (d) zygotene.

Description : The stage during which separation of the paired homologous chromosomes begins is (a) pachytene (b) diplotene (c) diakinesis (d) zygotene.

Last Answer : (b) diplotene

Crossing over takes place between which chromatids and in which stage of the cell cycle ? (a) Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. (b) Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I. (c) Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I. (d) Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.

Description : Crossing over takes place between which chromatids and in which stage of the cell cycle ? (a) Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. (b) Non- ... prophase I. (d) Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.

Last Answer : (b) Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.

.In salivary gland chromosomes/polytene chromosomes, pairing is (a) absent (b) occasional (c) formed between non-homologous chromosomes (d) formed between homologous chromosomes.

Description : .In salivary gland chromosomes/polytene chromosomes, pairing is (a) absent (b) occasional (c) formed between non-homologous chromosomes (d) formed between homologous chromosomes.

Last Answer : (d) formed between homologous chromosomes.

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

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 stage during which separation of the paired homologous chromosomes begins is (1) Pachytene (2) Diplotene (3) Diakinesis (4) Zygotene

Description : The stage during which separation of the paired homologous chromosomes begins is (1) Pachytene (2) Diplotene (3) Diakinesis (4) Zygotene

Last Answer : (2) Diplotene

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.

In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates (a) the two genes are linked and present on the same chromosome (b) both of the characters are controlled by more than one gene (c) the two genes are located on two different chromosomes (d) chromosomes failed to separate during meiosis.

Description : In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates (a) the two genes are linked and present on the ... two genes are located on two different chromosomes (d) chromosomes failed to separate during meiosis.

Last Answer : (a) the two genes are linked and present on the same chromosome

Pick up the correct statement from the following: (A) The surface defined by the locus of points having same phase, is called a wave front (B) The wave whose surface of constant phase are parallel planes, is known as a plane wave (C) The relative phase difference between the waves is important and not the absolute phase of a point on the wave (D) All of these

Description : Pick up the correct statement from the following: (A) The surface defined by the locus of points having same phase, is called a wave front (B) The wave whose surface of constant phase are parallel planes, ... waves is important and not the absolute phase of a point on the wave (D) All of these

Last Answer : Answer: Option D

What is A situation in which genes are attached to an organisms sex chromosomes the sex of an organism influences the expression of a gene?

Description : What is A situation in which genes are attached to an organisms sex chromosomes the sex of an organism influences the expression of a gene?

Last Answer : s.e.x linked