184512
In male human, how many linkage groups occur in their chromosome?
1 22
2 24
3 23
4 46
Explanation:
In human male, 24 linkage groups occur in their chromosome. All the genes present on a particular chromosome form a linkage group. In human, male \(=22\) pair autosome \(+1 \mathbf{X}\) chromosome \(+1 \mathrm{Y}\)-chromosome \(=24\) linkage group. The number of linkage group of a species correspond to the total number of different chromosomes of that species.
CG PMT-2010
Principle of Inheritance and Variation
184515
Two genes \(R\) and \(Y\) are located very close on the chromosomal linkage map of maize plant. When RRYY and ryy genotypes are hybridized, the \(F_{2}\) segregation will show:-
1 Higher number of the parental types
2 Higher number of the recombinant types
3 Segregation in the expected \(9: 3: 3: 1\) ratio
4 Segregation in \(3: 1\) ratio
Explanation:
If the genes \(\mathrm{R}\) and \(\mathrm{Y}\) are located very close on the chromosomal linkage map of maize plant and the chances of linkage will increase. - Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis and hence they show parental combinations. - Hence, when the distance between two genes decreases chances of linkage gets increased and when the RRYY and rryy genotypes are hybridized then, \(\mathrm{F}_{2}\) segregation will show high number of parental types.
AIPMT-2007
Principle of Inheritance and Variation
184519
A and \(B\) genes are linked. What shall be genotype of progeny in a cross between \(A B / a b\) and ab/ab : -
1 AAbb and aabb
2 \(\mathrm{AaBb}\) and aabb
3 AABB and aabb
4 None
Explanation:
The tendency of parental combinations to remain together, which is expressed in terms of low frequency of recombination (new combinations) is called linkage. Genes present on same chromosomes show linkage. - These genes are called linked, they will be passed on together in the progeny, gametes. \(\mathrm{Aa} \mathrm{Bb}\) and aa bb genotype is seen.
AIPMT-2001
Principle of Inheritance and Variation
184533
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
1 Coupling AABB, aabb; Repulsion AABB, aabb
2 Coupling AAbb, aaBB; Repulsion AaBb, aabb
3 Coupling aaBB, aabb; Repulsion AABB, aabb
4 Coupling AABB, aabb; Repulsion AAbb, aaBB
Explanation:
Exp. D In genetics, coupling means that two different traits are on the same chromosome, and they are inherited together. Repulsion means that these traits are on different chromosomes and are inherited independently. The correct parental arrangement for coupling is AABB on one chromosome and aabb on the other chromosome. For repulsion, it's AAbb on one chromosome and aaBB on the other chromosome.
AIPMT-1990
Principle of Inheritance and Variation
184526
Crossing over that results in genetic recombination in higher organisms occurs between :-
1 Non-sister chromatids of a bivalent
2 Two daughter nuclei
3 Two different bivalents
4 Sister chromatids of a bivalents
Explanation:
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. - It occur during pachytene stage of prophase-I of meiosis-I. - In this process, some genes of two non-sister chromatids of a bivalent are exchanged.
184512
In male human, how many linkage groups occur in their chromosome?
1 22
2 24
3 23
4 46
Explanation:
In human male, 24 linkage groups occur in their chromosome. All the genes present on a particular chromosome form a linkage group. In human, male \(=22\) pair autosome \(+1 \mathbf{X}\) chromosome \(+1 \mathrm{Y}\)-chromosome \(=24\) linkage group. The number of linkage group of a species correspond to the total number of different chromosomes of that species.
CG PMT-2010
Principle of Inheritance and Variation
184515
Two genes \(R\) and \(Y\) are located very close on the chromosomal linkage map of maize plant. When RRYY and ryy genotypes are hybridized, the \(F_{2}\) segregation will show:-
1 Higher number of the parental types
2 Higher number of the recombinant types
3 Segregation in the expected \(9: 3: 3: 1\) ratio
4 Segregation in \(3: 1\) ratio
Explanation:
If the genes \(\mathrm{R}\) and \(\mathrm{Y}\) are located very close on the chromosomal linkage map of maize plant and the chances of linkage will increase. - Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis and hence they show parental combinations. - Hence, when the distance between two genes decreases chances of linkage gets increased and when the RRYY and rryy genotypes are hybridized then, \(\mathrm{F}_{2}\) segregation will show high number of parental types.
AIPMT-2007
Principle of Inheritance and Variation
184519
A and \(B\) genes are linked. What shall be genotype of progeny in a cross between \(A B / a b\) and ab/ab : -
1 AAbb and aabb
2 \(\mathrm{AaBb}\) and aabb
3 AABB and aabb
4 None
Explanation:
The tendency of parental combinations to remain together, which is expressed in terms of low frequency of recombination (new combinations) is called linkage. Genes present on same chromosomes show linkage. - These genes are called linked, they will be passed on together in the progeny, gametes. \(\mathrm{Aa} \mathrm{Bb}\) and aa bb genotype is seen.
AIPMT-2001
Principle of Inheritance and Variation
184533
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
1 Coupling AABB, aabb; Repulsion AABB, aabb
2 Coupling AAbb, aaBB; Repulsion AaBb, aabb
3 Coupling aaBB, aabb; Repulsion AABB, aabb
4 Coupling AABB, aabb; Repulsion AAbb, aaBB
Explanation:
Exp. D In genetics, coupling means that two different traits are on the same chromosome, and they are inherited together. Repulsion means that these traits are on different chromosomes and are inherited independently. The correct parental arrangement for coupling is AABB on one chromosome and aabb on the other chromosome. For repulsion, it's AAbb on one chromosome and aaBB on the other chromosome.
AIPMT-1990
Principle of Inheritance and Variation
184526
Crossing over that results in genetic recombination in higher organisms occurs between :-
1 Non-sister chromatids of a bivalent
2 Two daughter nuclei
3 Two different bivalents
4 Sister chromatids of a bivalents
Explanation:
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. - It occur during pachytene stage of prophase-I of meiosis-I. - In this process, some genes of two non-sister chromatids of a bivalent are exchanged.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Principle of Inheritance and Variation
184512
In male human, how many linkage groups occur in their chromosome?
1 22
2 24
3 23
4 46
Explanation:
In human male, 24 linkage groups occur in their chromosome. All the genes present on a particular chromosome form a linkage group. In human, male \(=22\) pair autosome \(+1 \mathbf{X}\) chromosome \(+1 \mathrm{Y}\)-chromosome \(=24\) linkage group. The number of linkage group of a species correspond to the total number of different chromosomes of that species.
CG PMT-2010
Principle of Inheritance and Variation
184515
Two genes \(R\) and \(Y\) are located very close on the chromosomal linkage map of maize plant. When RRYY and ryy genotypes are hybridized, the \(F_{2}\) segregation will show:-
1 Higher number of the parental types
2 Higher number of the recombinant types
3 Segregation in the expected \(9: 3: 3: 1\) ratio
4 Segregation in \(3: 1\) ratio
Explanation:
If the genes \(\mathrm{R}\) and \(\mathrm{Y}\) are located very close on the chromosomal linkage map of maize plant and the chances of linkage will increase. - Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis and hence they show parental combinations. - Hence, when the distance between two genes decreases chances of linkage gets increased and when the RRYY and rryy genotypes are hybridized then, \(\mathrm{F}_{2}\) segregation will show high number of parental types.
AIPMT-2007
Principle of Inheritance and Variation
184519
A and \(B\) genes are linked. What shall be genotype of progeny in a cross between \(A B / a b\) and ab/ab : -
1 AAbb and aabb
2 \(\mathrm{AaBb}\) and aabb
3 AABB and aabb
4 None
Explanation:
The tendency of parental combinations to remain together, which is expressed in terms of low frequency of recombination (new combinations) is called linkage. Genes present on same chromosomes show linkage. - These genes are called linked, they will be passed on together in the progeny, gametes. \(\mathrm{Aa} \mathrm{Bb}\) and aa bb genotype is seen.
AIPMT-2001
Principle of Inheritance and Variation
184533
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
1 Coupling AABB, aabb; Repulsion AABB, aabb
2 Coupling AAbb, aaBB; Repulsion AaBb, aabb
3 Coupling aaBB, aabb; Repulsion AABB, aabb
4 Coupling AABB, aabb; Repulsion AAbb, aaBB
Explanation:
Exp. D In genetics, coupling means that two different traits are on the same chromosome, and they are inherited together. Repulsion means that these traits are on different chromosomes and are inherited independently. The correct parental arrangement for coupling is AABB on one chromosome and aabb on the other chromosome. For repulsion, it's AAbb on one chromosome and aaBB on the other chromosome.
AIPMT-1990
Principle of Inheritance and Variation
184526
Crossing over that results in genetic recombination in higher organisms occurs between :-
1 Non-sister chromatids of a bivalent
2 Two daughter nuclei
3 Two different bivalents
4 Sister chromatids of a bivalents
Explanation:
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. - It occur during pachytene stage of prophase-I of meiosis-I. - In this process, some genes of two non-sister chromatids of a bivalent are exchanged.
184512
In male human, how many linkage groups occur in their chromosome?
1 22
2 24
3 23
4 46
Explanation:
In human male, 24 linkage groups occur in their chromosome. All the genes present on a particular chromosome form a linkage group. In human, male \(=22\) pair autosome \(+1 \mathbf{X}\) chromosome \(+1 \mathrm{Y}\)-chromosome \(=24\) linkage group. The number of linkage group of a species correspond to the total number of different chromosomes of that species.
CG PMT-2010
Principle of Inheritance and Variation
184515
Two genes \(R\) and \(Y\) are located very close on the chromosomal linkage map of maize plant. When RRYY and ryy genotypes are hybridized, the \(F_{2}\) segregation will show:-
1 Higher number of the parental types
2 Higher number of the recombinant types
3 Segregation in the expected \(9: 3: 3: 1\) ratio
4 Segregation in \(3: 1\) ratio
Explanation:
If the genes \(\mathrm{R}\) and \(\mathrm{Y}\) are located very close on the chromosomal linkage map of maize plant and the chances of linkage will increase. - Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis and hence they show parental combinations. - Hence, when the distance between two genes decreases chances of linkage gets increased and when the RRYY and rryy genotypes are hybridized then, \(\mathrm{F}_{2}\) segregation will show high number of parental types.
AIPMT-2007
Principle of Inheritance and Variation
184519
A and \(B\) genes are linked. What shall be genotype of progeny in a cross between \(A B / a b\) and ab/ab : -
1 AAbb and aabb
2 \(\mathrm{AaBb}\) and aabb
3 AABB and aabb
4 None
Explanation:
The tendency of parental combinations to remain together, which is expressed in terms of low frequency of recombination (new combinations) is called linkage. Genes present on same chromosomes show linkage. - These genes are called linked, they will be passed on together in the progeny, gametes. \(\mathrm{Aa} \mathrm{Bb}\) and aa bb genotype is seen.
AIPMT-2001
Principle of Inheritance and Variation
184533
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
1 Coupling AABB, aabb; Repulsion AABB, aabb
2 Coupling AAbb, aaBB; Repulsion AaBb, aabb
3 Coupling aaBB, aabb; Repulsion AABB, aabb
4 Coupling AABB, aabb; Repulsion AAbb, aaBB
Explanation:
Exp. D In genetics, coupling means that two different traits are on the same chromosome, and they are inherited together. Repulsion means that these traits are on different chromosomes and are inherited independently. The correct parental arrangement for coupling is AABB on one chromosome and aabb on the other chromosome. For repulsion, it's AAbb on one chromosome and aaBB on the other chromosome.
AIPMT-1990
Principle of Inheritance and Variation
184526
Crossing over that results in genetic recombination in higher organisms occurs between :-
1 Non-sister chromatids of a bivalent
2 Two daughter nuclei
3 Two different bivalents
4 Sister chromatids of a bivalents
Explanation:
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. - It occur during pachytene stage of prophase-I of meiosis-I. - In this process, some genes of two non-sister chromatids of a bivalent are exchanged.
184512
In male human, how many linkage groups occur in their chromosome?
1 22
2 24
3 23
4 46
Explanation:
In human male, 24 linkage groups occur in their chromosome. All the genes present on a particular chromosome form a linkage group. In human, male \(=22\) pair autosome \(+1 \mathbf{X}\) chromosome \(+1 \mathrm{Y}\)-chromosome \(=24\) linkage group. The number of linkage group of a species correspond to the total number of different chromosomes of that species.
CG PMT-2010
Principle of Inheritance and Variation
184515
Two genes \(R\) and \(Y\) are located very close on the chromosomal linkage map of maize plant. When RRYY and ryy genotypes are hybridized, the \(F_{2}\) segregation will show:-
1 Higher number of the parental types
2 Higher number of the recombinant types
3 Segregation in the expected \(9: 3: 3: 1\) ratio
4 Segregation in \(3: 1\) ratio
Explanation:
If the genes \(\mathrm{R}\) and \(\mathrm{Y}\) are located very close on the chromosomal linkage map of maize plant and the chances of linkage will increase. - Linkage is the phenomenon in which genes are situated on the same chromosome (linked genes) and have the tendency to inherit together during meiosis and hence they show parental combinations. - Hence, when the distance between two genes decreases chances of linkage gets increased and when the RRYY and rryy genotypes are hybridized then, \(\mathrm{F}_{2}\) segregation will show high number of parental types.
AIPMT-2007
Principle of Inheritance and Variation
184519
A and \(B\) genes are linked. What shall be genotype of progeny in a cross between \(A B / a b\) and ab/ab : -
1 AAbb and aabb
2 \(\mathrm{AaBb}\) and aabb
3 AABB and aabb
4 None
Explanation:
The tendency of parental combinations to remain together, which is expressed in terms of low frequency of recombination (new combinations) is called linkage. Genes present on same chromosomes show linkage. - These genes are called linked, they will be passed on together in the progeny, gametes. \(\mathrm{Aa} \mathrm{Bb}\) and aa bb genotype is seen.
AIPMT-2001
Principle of Inheritance and Variation
184533
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
1 Coupling AABB, aabb; Repulsion AABB, aabb
2 Coupling AAbb, aaBB; Repulsion AaBb, aabb
3 Coupling aaBB, aabb; Repulsion AABB, aabb
4 Coupling AABB, aabb; Repulsion AAbb, aaBB
Explanation:
Exp. D In genetics, coupling means that two different traits are on the same chromosome, and they are inherited together. Repulsion means that these traits are on different chromosomes and are inherited independently. The correct parental arrangement for coupling is AABB on one chromosome and aabb on the other chromosome. For repulsion, it's AAbb on one chromosome and aaBB on the other chromosome.
AIPMT-1990
Principle of Inheritance and Variation
184526
Crossing over that results in genetic recombination in higher organisms occurs between :-
1 Non-sister chromatids of a bivalent
2 Two daughter nuclei
3 Two different bivalents
4 Sister chromatids of a bivalents
Explanation:
Crossing over is the exchange of chromosomal segments between non-sister chromatids of homologous chromosomes during the production of gametes. - It occur during pachytene stage of prophase-I of meiosis-I. - In this process, some genes of two non-sister chromatids of a bivalent are exchanged.
