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Q. No.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%
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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Extra-nuclear inheritance is a form of non-Mendelian inheritance in which a trait is transmitted from the parent to offspring through non-chromosomal, cytoplasmic means. Through which of the following ways does this phenomenon occur?
1. Intra cellular parasites residing as endosymbionts
2. Organelles that contain their own DNA
3. mRNA transcripts and proteins present in the cytoplasm
4. All of the above
1. Intra cellular parasites residing as endosymbionts
2. Organelles that contain their own DNA
3. mRNA transcripts and proteins present in the cytoplasm
4. All of the above
Subtopic: Introduction to Genetics: 2 |
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Given below are two statements
In light of the above statements, choose the most appropriate answer from the options given below :
1. Both statement I and Statement II are correct
2. Both statement I and statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but statement II is correct
| Statement I: | A color blind girl is rare because she will inherit the trait only when her father and maternal grandfather were color blind. |
| Statement II: | A color blind mother and normal father would have color blind sons and daughters. |
1. Both statement I and Statement II are correct
2. Both statement I and statement II are incorrect
3. Statement I is correct but statement II is incorrect
4. Statement I is incorrect but statement II is correct
Subtopic: Mendelian Disorders |
65%
From NCERT
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Species A has 2n=12 and species B has 2n=18. What are the possible chromosome numbers that may be found in allotetraploids formed from species A and species B?
1. 27, 30, 33
2. 12, 18, 6
3. 9, 18, 27
4. 12, 18, 30
1. 27, 30, 33
2. 12, 18, 6
3. 9, 18, 27
4. 12, 18, 30
Subtopic: Non - Disjunction & Aneuploidy |
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During the biosynthesis of haemoglobin in sickle cell anaemic patients, CAC codon is transcribed to
1. GUG
2. GAG
3. CAC
4. CUC
1. GUG
2. GAG
3. CAC
4. CUC
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
70%
From NCERT
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Given below are two statements:
Statement I: Down's syndrome is a genetic disorder due to the presence of an additional copy
Statement II: The affected individual is short statured with small round head, is sterile and expresses Gynaecomastia
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but Statement II is true
Statement I: Down's syndrome is a genetic disorder due to the presence of an additional copy
Statement II: The affected individual is short statured with small round head, is sterile and expresses Gynaecomastia
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but Statement II is true
Subtopic: Non - Disjunction & Aneuploidy |
69%
From NCERT
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