Question

Difficulty: EasyBasic Genetics Terminology and Concepts

Pair each basic genetic term listed on the left with its correct biological description on the right.

  • HeterozygousPossessing two non-identical alleles for a specific gene on homologous chromosomes.
  • GenotypeThe specific allele composition or genetic constitution of an organism at a given locus.
  • Dominant alleleAn allele that masks the phenotypic expression of its contrasting alternative form in a diploid organism.
  • PhenotypeThe observable physical, structural, or physiological traits of an organism resulting from its genetic makeup.

Answer

Heterozygous matches with possessing two non-identical alleles; Genotype matches with the specific allele composition; Dominant allele matches with an allele that masks its contrasting form; Phenotype matches with the observable physical traits.
Each genetic term matches its corresponding definition precisely: Heterozygous indicates possessing two non-identical alleles at a locus; Genotype represents the organism's specific allele composition; Dominant allele describes an allele that masks the expression of its contrasting alternative form; and Phenotype refers to the observable physical or physiological traits.

Step-by-Step Solution

1
Define Heterozygous
Heterozygous refers to having different alleles at a given gene locus.
The prefix 'hetero-' means different, indicating non-identical alleles.
2
Define Genotype
Genotype represents the internal genetic code or allele constitution.
Genotype specifies the genetic information rather than the outward appearance.
3
Define Dominant allele
A dominant allele masks the phenotypic effect of its alternative allele.
Dominance means the trait is expressed whenever at least one copy of the allele is present.
4
Define Phenotype
Phenotype represents the observable attributes and physical characteristics.
Phenotype is the external expression resulting from genotypic and environmental factors.

Key Concept

Basic Genetics Terminology and Concepts
Estimated Time:1m 0s
Rate this question