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Q. No.In a linear chromosome map distances between four loci are -a and b = 20 mu; a and d = 6mu; b and c=8 mu; a and c= 12 mu. What will be the crossover frequency between c and d ?
1. 12%
2. 20%
3. 3%
4. 6%
Subtopic: Chromosomal Basis of Inheritance: Introduction | Linkage Types | Recombination & Gene Mapping |
59%
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Which of the following display female heterogametry?
1. Drosophila melanogaster
2. Apis mellifera
3. Gallus gallus domesticus
4. Periplaneta Americana
1. Drosophila melanogaster
2. Apis mellifera
3. Gallus gallus domesticus
4. Periplaneta Americana
Subtopic: Sex Determination | Sex Determination: Further Considerations |
56%
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In a particular chromosome, the recombination frequency between genes a &c is 5%; b & c is 15%; b &d is 9%; a &b is 20%; c &d is 24% and a & d is 29%. The sequence of genes in a chromosome is
1. a, d, b, c
2. d, b, a, c
3. a, b, c, d
4. a, c, b, d
1. a, d, b, c
2. d, b, a, c
3. a, b, c, d
4. a, c, b, d
Subtopic: Chromosomal Basis of Inheritance: Introduction | Recombination & Gene Mapping |
70%
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Which one of the following anticodons are used for the translation of t-RNA during the biosynthesis of hemoglobin in sickel cell anemic patients?
1. CAC
2. CUC
3. GUG
4. GAG
1. CAC
2. CUC
3. GUG
4. GAG
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
From NCERT
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Match List I with List II
Choose the correct answer from the options given below:
1. A-III B-I C-II D-IV
2. A-III B- IV C-II D-I
3. A-IV B-III C-II D-I
4. A-II B-III C-I D-IV
| List I | List II |
| A. Mendelian Disorder | I. Chromosomal Theory of inheritance |
| B. Alfred Sturtevant | II. Klinefelter's syndrome |
| C. Chromosomal Disorder | III. Cystic fibrosis |
| D. Sutton and Boveri | IV. Used the frequency of recombination between the gene pair in the same chromosome |
Choose the correct answer from the options given below:
1. A-III B-I C-II D-IV
2. A-III B- IV C-II D-I
3. A-IV B-III C-II D-I
4. A-II B-III C-I D-IV
Subtopic: Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations | Recombination & Gene Mapping | Mendelian Disorders |
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If two plants having heterozygous genotype for a trait are crossed, what percentage of the progeny will have heterozygous genotype?
1. 25%
2. 50%
3. 75%
4. 100%
1. 25%
2. 50%
3. 75%
4. 100%
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
86%
From NCERT
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Phenylketonuria is a
1. Sex-linked dominant disease
2. Autosomal dominant disease
3. Sex-linked recessive disease
4. Autosomal recessive disease
1. Sex-linked dominant disease
2. Autosomal dominant disease
3. Sex-linked recessive disease
4. Autosomal recessive disease
Subtopic: Mendelian Disorders |
83%
From NCERT
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A test-cross was carried out for a pea plant having genotype RR and phenotype as round seeds. What would be the ratio of phenotype (plants with round seeds; plants with wrinkled seeds) in the resulting progeny?
1. All wrinkled
2. Round: wrinkled :: 1:1
3. Round: wrinkled :: 3:1
4. All round
1. All wrinkled
2. Round: wrinkled :: 1:1
3. Round: wrinkled :: 3:1
4. All round
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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Which of the following are true of sex linked inhertiance in humans?
A. Males are considered to be hemizygous for genes present on X-chromosome
B. Majority of sex-linked traits are carried on the X-chromosome
C. Genes that are not sex-linked are present in somatic cells and absent in germ cells
D. 1:1 ratio of males and females in humans is a result of meiosis in males
E. The single X-chromosome present in the father is inherited by the son (male-to-male transmission)
Choose the correct answer from the options given below:
1. A and B only
2. B and D only
3. A, B and C only
4. B, D and E only
A. Males are considered to be hemizygous for genes present on X-chromosome
B. Majority of sex-linked traits are carried on the X-chromosome
C. Genes that are not sex-linked are present in somatic cells and absent in germ cells
D. 1:1 ratio of males and females in humans is a result of meiosis in males
E. The single X-chromosome present in the father is inherited by the son (male-to-male transmission)
Choose the correct answer from the options given below:
1. A and B only
2. B and D only
3. A, B and C only
4. B, D and E only
Subtopic: Sex Determination |
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Which of the following are true about the ABO blood groupings in humans?
Choose the correct answer from the options given below:
1. B and E only
2. A and C only
3. A and B only
4. D and E only
| A. | It is regulated by multiple alleles |
| B. | It shows a total of six different genotypes but only four different phenotypes |
| C. | AB blood type is an example of incomplete dominance |
| D. | Persons with O-blood type are considered as universal acceptors |
| E. | A person cannot have O-blood type if his mother has A-blood type and father has B blood type |
Choose the correct answer from the options given below:
1. B and E only
2. A and C only
3. A and B only
4. D and E only
Subtopic: Monohybrid Cross: Further Understanding |
85%
From NCERT
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