In genetics, traits can be transmitted and expressed through various non-Mendelian and chromosomal mechanisms. Match each pattern of genetic inheritance with its defining biological description. Which description correctly pairs with each inheritance pattern?
- Incomplete dominanceThe heterozygous phenotype is an intermediate blend between the two homozygous parental phenotypes
- CodominanceBoth alleles are fully and distinctly expressed in the heterozygous individual without blending
- Polygenic inheritanceA single continuous phenotypic trait is controlled by the additive effect of multiple separate genes
- Sex-linked inheritanceTraits are governed by genes located specifically on sex chromosomes rather than autosomes
Answer
Incomplete dominance matches with the intermediate blended phenotype; Codominance matches with the simultaneous, distinct expression of both alleles; Polygenic inheritance matches with a single trait governed by multiple additive genes; Sex-linked inheritance matches with traits controlled by genes on sex chromosomes.
Each inheritance pattern describes a distinct genetic phenomenon: incomplete dominance produces an intermediate phenotype between two homozygotes; codominance manifests both distinct alleles simultaneously; polygenic inheritance produces continuous traits through the interaction of multiple distinct genes; and sex-linked inheritance involves transmission of traits carried on sex chromosomes.
Step-by-Step Solution
Key Concept
Complex Patterns of Heredity and Gene Expression
Estimated Time:1m 0s