Question: 130. What is the pattern of inheritance for polygenic trait?
(1) Mendelian inheritance pattern
(2) Non-mendelian inheritance pattern
(3) Autosomal dominant pattern
(4) X-linked recessive inheritance pattern
Answer: Option (2)
Explanation:
Polygenic traits are controlled by multiple genes, each contributing a small effect to the phenotype.
Such traits show continuous variation, for example height, skin color, and intelligence.
They do not follow the simple Mendelian ratios of inheritance because more than one gene is involved.
Therefore, polygenic traits follow a non-mendelian inheritance pattern.
Hence, the correct answer is option (2).