Select Question Set:
Q. No.When a single gene can exhibit multiple phenotypic expression, the gene is said to be:
1. showing phenotypic plasticity
2. polygenic
3. pleiotropic
4. polymorphic
Subtopic: Polygenic Inheritance & Pleiotropy |
90%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Males have one X and one Y chromosome in:
I: Humans
II: Grasshoppers
III: Birds
IV: Fruit fly
1. Only I and II
2. Only I and IV
3. Only II and III
4. Only II and IV
I: Humans
II: Grasshoppers
III: Birds
IV: Fruit fly
1. Only I and II
2. Only I and IV
3. Only II and III
4. Only II and IV
Subtopic: Pedigree Analysis: Basics |
85%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | Male honeybees do not have father and thus cannot have sons, but have a grandfather and can have grandsons. |
| Reason (R): | Male honeybees produce sperms by mitosis. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Sex Determination: Further Considerations |
54%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | A sex linked recessive disorders is expected to be more common in males than in females. |
| Reason (R): | Males are hemizygous for sex chromosomes. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Sex Linked Recessive Inheritance |
70%
Please attempt this question first.
Hints
What is not true regarding Phenylketonuria?
| 1. | It is an inborn error of metabolism. |
| 2. | It is inherited as an autosomal recessive trait. |
| 3. | The affected individual lacks an enzyme that converts the amino acid tyrosine into phenylalanine. |
| 4. | Accumulation of phenylpyruvic acid in brain results in mental retardation. |
Subtopic: Mendelian Disorders |
82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Statement I: | Thalassemia is a qualitative problem of synthesising an incorrectly functioning globin. |
| Statement II: | Sickle cell anaemia is a quantitative problem of synthesising too few globin molecules. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Mendelian Disorders: Thalassemia |
82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Turner’s Syndrome:
| I: | is an aneuploidy |
| II: | causes infertility in affected females |
| III: | does not affect the development of secondary sexual characters in affected females |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Sex Aneuploidy - Turner & Klinefelter Syndrome |
82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In Pisum sativum, the flower position may be axial (allele A) or terminal (allela a). What would be the percentage of the offspring with respect to axial flower position, if a cross is made between parents \(Aa \times aa\) ?
1. 25%
2. 50%
3. 75%
4. 100%
1. 25%
2. 50%
3. 75%
4. 100%
Subtopic: Monohybrid Cross: Further Understanding |
85%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In humans, rolling of tongue is an autosomal dominant trait (R). In a family both the parents have the trait of rolling tongue but their daughter does not show the trait, whereas the sons have the trait of rolling of tongue.
The genotypes of the family would be:
The genotypes of the family would be:
| Mother | Father | Daughter | Son | |
| 1. | Rr | Rr | rr | rr |
| 2. | Rr | Rr | rr | RR |
| 3. | rr | Rr | RR | rr |
| 4. | RR | rr | Rr | Rr |
Subtopic: Pedigree Analysis: More Examples |
81%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Study the pedigree analysis of human given below and identify the type of inheritance along with an example :
1. Sex-linked recessive, Haemophilia
2. Sex-linked dominant, Vitamin D resistant rickets
3. Autosomal recessive, Sickle-cell anaemia
4. Autosomal dominant, Myotonic dystrophy
1. Sex-linked recessive, Haemophilia
2. Sex-linked dominant, Vitamin D resistant rickets
3. Autosomal recessive, Sickle-cell anaemia
4. Autosomal dominant, Myotonic dystrophy
Subtopic: Pedigree Analysis: More Examples |
67%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.