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

6. Chromosomal Variation

Chromosomal Mutations: Aneuploidy

Genetics

6. Chromosomal Variation

Chromosomal Mutations: Aneuploidy

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Multiple Choice

A gamete is aneuploid if:

it contains only autosomes and no sex chromosomes

it has extra copies of all chromosomes

it contains an abnormal number of chromosomes

it has a complete set of chromosomes from both parents

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Verified step by step guidance

Understand the definition of aneuploidy: Aneuploidy refers to a condition where a cell has an abnormal number of chromosomes, which means it can have either extra or missing chromosomes compared to the normal set.

Recall that normal gametes are haploid, containing one complete set of chromosomes, including both autosomes and sex chromosomes, so any deviation from this number is considered abnormal.

Analyze each option by comparing it to the definition of aneuploidy: For example, having only autosomes and no sex chromosomes is not necessarily aneuploidy, but rather a specific chromosome composition.

Recognize that having extra copies of all chromosomes corresponds to polyploidy, not aneuploidy, because aneuploidy involves changes in individual chromosomes, not whole sets.

Conclude that the correct description of an aneuploid gamete is one that contains an abnormal number of chromosomes, meaning it has either missing or extra chromosomes relative to the normal haploid number.