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 |
List-I Types of inheritance |
List-II Example |
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A. | Incomplete dominance | I. | Blood groups in human |
B. | Co-dominance | II. | Flower colour in Antirrhinum |
C. | Pleiotropy | III. | Skin colour in human |
D. | Polygenic inheritance | IV. | Phenylketonuria |
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. |
Select the correct statements with respect to pleiotropism:
(a) | A gene is said to be pleiotropy 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
Assuming that fur colour of an animal is dark, range of colour shade and 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
The best example of pleiotropy is:
1. | Skin color | 2. | Phenylketonuria |
3. | Colour Blindness | 4. | ABO Blood group |