Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

21. Population Genetics

Allelic Frequency Changes

Genetics

21. Population Genetics

Allelic Frequency Changes

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Multiple Choice

Which term best describes a version of a gene that can exist at a specific locus within a population?

Genotype

Chromosome

Allele

Phenotype

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Verified step by step guidance

Understand the key terms involved: A 'gene' is a segment of DNA that codes for a trait, and a 'locus' is the specific physical location of a gene on a chromosome.

Recognize that a gene can have different versions or forms, which are called 'alleles'. These alleles occupy the same locus but may have variations in their DNA sequence.

Differentiate between the options: 'Genotype' refers to the combination of alleles an individual has, 'Chromosome' is the structure that carries genes, and 'Phenotype' is the observable trait resulting from the genotype and environment.

Since the question asks for the term describing a version of a gene at a specific locus, focus on the concept of different forms of a gene rather than the whole chromosome or the trait expressed.

Conclude that the correct term for a version of a gene at a specific locus is 'allele', as it directly refers to the variant forms of a gene within a population.