Biology - Principles of Inheritance and Variation Question with Solution | TestHub
Match List I with List II
| List I Types of gene interaction. | List II Examples. |
|---|---|
| (A). Pleiotropy | (I). Mirabilis jalapa |
| (B). Codominance | (II). ABO blood group |
| (C). Incomplete dominance | (III). Sickle cell anemia |
| (D). Multiple allele | (IV). Coat color in cattle |
Choose thecorrectanswer from the options given below:
Options:
Answer:
Solution:
Pleiotropy occurs when a single gene influences multiple phenotypic traits. Sickle cell anemia is a classic example, where a single mutation in the beta-globin gene affects red blood cell shape, leading to multiple systemic effects.
Codominance is a condition where both alleles in a heterozygote are fully expressed. Coat color in cattle (roan coat) is an example, where both red and white hairs are expressed together.
Incomplete dominance occurs when the phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes. Flower color inMirabilis jalapa(Four o'clock plant) is an example, where a cross between red and white flowers produces pink flowers.
Multiple allelism refers to the presence of more than two alleles for a given gene within a population. The ABO blood group system in humans is an example, controlled by three alleles: , , and .
Thus, the correct matching is (A) - (III), (B) - (IV), (C) - (I), (D) - (II).
Answer: (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
