Q. No.What is the pattern of inheritance for polygenic traits?
| 1. | Autosomal dominant pattern |
| 2. | X-linked recessive inheritance pattern |
| 3. | Mendelian inheritance pattern |
| 4. | Non-Mendelian inheritance pattern |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 51%
Level 3: 35%-60%
NEET - 2025
Please attempt this question first.
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Please attempt this question first.
The phenomenon where a single gene exhibits multiple phenotypic expressions is called:
1. Co-dominance
2. Pleiotropy
3. Multiple alleles
4. Polygenic inheritance
1. Co-dominance
2. Pleiotropy
3. Multiple alleles
4. Polygenic inheritance
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 83%
Level 1: 80%+
NEET - 2024
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below.
1. Statement I is True but Statement II is False
2. Statement I is False but Statement II is True
3. Both Statement I and Statement II are True
4. Both Statement I and Statement II are False
| Statement I: | When many alleles of single gene govern a character, it is called polygenic inheritance. |
| Statement II: | In polygenic inheritance, the effect of each allele is additive |
1. Statement I is True but Statement II is False
2. Statement I is False but Statement II is True
3. Both Statement I and Statement II are True
4. Both Statement I and Statement II are False
Subtopic: Â Polygenic Inheritance & Pleiotropy |
Level 3: 35%-60%
NEET - 2024
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The phenomenon of pleiotropism refers to:
| 1. | more than two genes affecting a single character. |
| 2. | presence of several alleles of a single gene controlling a single crossover. |
| 3. | presence of two alleles, each of the two genes controlling a single trait. |
| 4. | a single gene affecting multiple phenotypic expressions. |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 80%
Level 1: 80%+
NEET - 2023
Hints
Select the correct statements with respect to pleiotropism:
| (a) | A gene is said to be pleiotropic if it affects more than one trait |
| (b) | Phenylketonuria is an example of pleiotropy |
| (c) | A condition where one gene has several alleles is referred to as pleiotropism |
| (d) | A trait is said to be pleiotropic if several genes control it |
Choose the correct answer from the options given below:
| 1. | (a) and (b) only | 2. | (a) and (d) only |
| 3. | (a), (b) and (c) only | 4. | (b), (c) and (d) only |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 62%
Level 2: 60%+
NEET - 2022
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Assuming that fur colour of an animal ranges from dark, intermediates shades, to white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F1 generation?
| 1. | All intermediate colour | 2. | Range of colour shade |
| 3. | All dark colour | 4. | All white colour |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 68%
Level 2: 60%+
NEET - 2022
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The best example of pleiotropy is:
| 1. | Skin color | 2. | Phenylketonuria |
| 3. | Colour Blindness | 4. | ABO Blood group |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 73%
Level 2: 60%+
NEET - 2020
Hints
Match the terms in Column-I with their description in Column-II and choose the correct option.
| Column-I | Column-II | ||
| A. | Dominance | 1. | Many govern a single character |
| B. | Codominance | 2. | In a heterozygous organism, only one allele expresses itself |
| C. | Pleiotropy | 3. | In a heterozygous organism, both alleles express themselves fully |
| D. | Polygenic inheritance | 4. | A single gene influences many characters |
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 4 | 1 | 2 | 3 |
| 3. | 4 | 3 | 1 | 2 |
| 4. | 2 | 1 | 4 | 3 |
Subtopic: Â Polygenic Inheritance & Pleiotropy |Â Co-dominance |
 91%
Level 1: 80%+
NEET - 2016
Hints
A pleiotropic gene:
| 1. | Is expressed only in primitive plants |
| 2. | Is a gene that evolved during Pliocene |
| 3. | Controls a trait only in combination with another gene |
| 4. | Controls multiple traits in an individual |
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 90%
Level 1: 80%+
NEET - 2015
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Inheritance of skin colour in humans is an example of:
1. chromosomal aberration
2. point mutation
3. polygenic inheritance
4. codominance
Subtopic: Â Polygenic Inheritance & Pleiotropy |
 91%
Level 1: 80%+
AIPMT - 2007
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