Answer: Chromosomal regions containing multiple genes that together contribute to complex quantitative traits.
- A Single-gene traits that generally follow simple Mendelian dominant-recessive inheritance patterns
- B Chromosomal regions containing multiple genes that together contribute to complex quantitative traits
- C Mainly the dominant alleles that happen to be present at a given genetic locus
- D Mainly environmental factors that have no underlying genetic basis whatsoever
Correct answer: B. Chromosomal regions containing multiple genes that together contribute to complex quantitative traits
Explanation: QTL analysis: statistical method to map chromosomal regions containing genes that contribute to polygenic/complex traits (height, yield, disease risk).
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
Read the full Principles of Inheritance and Variation notes →