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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

3. Extensions to Mendelian Inheritance

Sex Chromosome

Genetics

3. Extensions to Mendelian Inheritance

Sex Chromosome

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Multiple Choice

Which of the following statements about human sex chromosomes is correct?

Both males and females have two Y chromosomes.

The X chromosome is only present in males.

Females have two X chromosomes, while males have one X and one Y chromosome.

The Y chromosome carries more genes than the X chromosome.

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Verified step by step guidance

Review the basic biology of human sex chromosomes: humans have two sex chromosomes that determine biological sex, commonly referred to as X and Y chromosomes.

Recall that females typically have two X chromosomes (XX), while males typically have one X and one Y chromosome (XY).

Understand that the statement 'Both males and females have two Y chromosomes' is incorrect because females do not have Y chromosomes.

Recognize that the statement 'The X chromosome is only present in males' is incorrect because both males and females have at least one X chromosome.

Know that the Y chromosome carries fewer genes than the X chromosome, so the statement 'The Y chromosome carries more genes than the X chromosome' is false.